If you take _______ risk of drunk driving, yo...

If you take _______ risk of drunk driving, you are at _______ risk.

A. a; the         B. the; a           C. /; /            D. the; /

高二英语单项填空困难题查看答案及解析

If you take __________risk of not wearing a seat belt, you will be at __________risk.

A．/; /　　　B．/; the             C．the; /                           D．the; the

高二英语单项填空中等难度题查看答案及解析

If you are taking vitamin supplements to reduce your risk of heart disease or cancer, a group of health experts want you to know that those vitamins may actually increase your risk of cancer.

The US Preventive Services Task Force came to this conclusion after reviewing dozens of studies.

Nearly half of adults in the US take at least one vitamin or mineral supplement on a regular basis. These pills are advertised as a way to promote general health. In some cases, producers promote them as cancer fighters and heart protectors.

Studies in animals and in laboratory dishes suggest that oxidative(氧化性的) stress contributes to diseases like cancer and heart disease. If so, there is a reason to believe that antioxidants—including beta－carotene, vitamins A, C, and E—could be useful as preventive medicines.

But when the Task Force examined the medical evidence on vitamins, it found “inadequate(不充分的) evidence” to support the claims that vitamin and mineral supplements benefit healthy adults.

“Cardiovascular(心血管的) disease and cancer have a significant health impact in America, and we all want to find ways to prevent these diseases，” Dr. Virginia Moyer, who heads the Task Force, said in a statement. But so far, she added, the medical evidence does not show that taking vitamins is helpful in this aspect.

However, the Task Force did find “adequate evidence” that people with a raised risk for lung cancer actually increase their risk further by taking beta－carotene, a precursor of vitamin A.

The Task Force recommendations of taking vitamins regularly apply to healthy adults aged 50 and older who don't have “ special nutritional needs”. The advice does not apply to children, women who are pregnant or may become pregnant, people with chronic illnesses, or people who have to take supplements because they can't get all their essential nutrients from their diet.

1.Studies in animals and in laboratory dishes find out________．

A. adequate evidence that taking vitamins are helpful for treating lung cancer

B. cardiovascular disease spreads very fast in America

C. oxidative stress can lead to heart disease and cancer

D. people must take vitamins on a regular basis

2.What can we conclude from Task Force's findings?

A. Scientists want to control cardiovascular disease.

B. In some aspects, taking vitamins is not useful.

C. Producers cannot produce medical－use vitamins.

D. Vitamins must be useful to prevent cancer and heart disease.

3.Who can take vitamins regularly according to the advice of the Task Force?

A. A 60－year－old healthy worker.

B. A 15－year－old boy with short－sightedness.

C. A 34－year－old pregnant lady.

D. A 40－year－old man who never eats vegetables or fruits.

4.What's the best title for the text?

A. An Inside Look at Vitamins

B. Task Force: Ending to Vitamins

C. Vitamins: To Live or to Kill

D. Taking Vitamins to Prevent Diseases May Fail

高二英语阅读理解中等难度题查看答案及解析

If you are taking vitamin supplements to reduce your risk of heart disease or cancer, a group of health experts want you to know that those vitamins may actually increase your risk of cancer.

The US Preventive Services Task Force came to this conclusion after reviewing dozens of studies.

Nearly half of adults in the US take at least one vitamin or mineral supplement on a regular basis. These pills are advertised as a way to promote general health. In some cases, manufacturers promote them as cancer fighters and heart protectors.

Studies in animals and in laboratory dishes suggest that oxidative(氧化性的) stress contributes to diseases like cancer and heart disease. If so, there is a reason to believe that antioxidants—including beta-carotene, vitamins A, C, and E—could be useful as preventive medicines.

But when the Task Force examined the medical evidence on vitamins, it found “inadequate(不充分的) evidence” to support the claims that vitamin and mineral supplements benefit healthy adults.

“Cardiovascular(心血管的) disease and cancer have a significant health impact in America, and we all want to find ways to prevent these diseases,” Dr. Virginia Moyer, who heads the Task Force, said in a statement. But so far, she added, the medical evidence does not show that taking vitamins is helpful in this regard.

However, the Task Force did find “adequate evidence” that people with a raised risk for lung cancer actually increase their risk further by taking beta-carotene, a precursor of vitamin A.

The Task Force recommendations of taking vitamins regularly apply to healthy adults aged 50 and older who don't have “ special nutritional needs”. The advice does not apply to children, women who are pregnant or may become pregnant, people with chronic illnesses, or people who have to take supplements because they can't get all their essential nutrients from their diet.

1.Studies in animals and in laboratory dishes find out________.

A. ample evidence that taking vitamins are helpful for treating lung cancer

B. cardiovascular disease spreads very fast in America

C. oxidative stress can lead to heart disease and cancer

D. people must take vitamins on a regular basis

2.What can we conclude from Task Force's findings?

A. Scientists want to control cardiovascular disease.

B. In some regard, taking vitamins is not useful.

C. Manufacturers cannot produce medical-use vitamins.

D. Vitamins must be useful to prevent cancer and heart disease.

3.Who can take vitamins regularly according to the advice of the Task Force?

A. A 60-year-old healthy worker.

B. A 15-year-old boy with short-sightedness.

C. A 34-year-old pregnant lady.

D. A 40-year-old man who never eats vegetables or fruits.

4.What's the best title for the text?

A. An Inside Look at Vitamins

B. Task Force: Ending to Vitamins

C. Vitamins: To Live or to Kill

D. Taking Vitamins to Prevent Cancer May Fail

高二英语阅读理解中等难度题查看答案及解析

Could you drive me to the supermarket at noon if ______?

A．it’s convenient of you           B．you are convenient

C．it’s convenient to you           D．you will be convenient

高二英语单项填空简单题查看答案及解析

Could you drive me to the bookstore at noon if________?

A. it's convenient of you    B. you are convenient

C. it's convenient to you    D. you will be convenient

高二英语单项填空中等难度题查看答案及解析

If you are interested in studying at an American university, you have to take the Test of English as a Foreign Language. The test is widely known as the TOEFL. It is the most widely used language exam for American universities.

There are two major kinds of the TOEFL test. The first is the IBT, or Internet-based Test. It is offered in most of the world and accepted by nearly every university and scholarship program in the United States.The other kind of the test is called the Paper-based Test or PBT. The PBT is less costly to take and does not require use of the Internet.

But how to get started with TOEFL? Here are some tips.

1. Plan ahead ---It takes a long time to improve your TOEFL score. Do not expect a big lift in your test results after two weeks. You will have to spend a lot of time and energy.

2. Master the basics first ---You should have to be good at basic English before you take the test. If you score below 500 on the PBT or 70 on the IBT, study for a few months and come back to the TOEFL later.

3. Get a study guide --- It is easy to find study guides for the IBT. Pearson, Barron's, ETS, and Kaplan all produce quality materials. Take a practice test once or twice a month. The best study guides will have explanations in the answer key.

4. Use outside resources ---　 Remember, you are learning a language, not a test. You can improve your TOEFL score by making English part of your daily life. Some simple ways are listening to English speakers, watching movies and reading newspapers. Some others are reading English textbooks, sending and reading text messages in English, and writing online in English.

The best way to do well on the TOEFL is to know English well.The real goal of the test is to measure how well a student can communicate in English-speaking classroom.

If you want to know more, please click here.

1.If you want to study in an America university, you have to_________.

A. be very rich and work hard

B. be well prepared to take the TOEFL test

C. ask an English teacher to help you

D. prepare for a month before taking the TOEFL test

2.From the passage we can learn that___________.

A. the IBT is more expensive to take and requires use of the Internet.

B. Pearson is a person who teaches quality materials.

C. If you score 500 on the PBT,you can pass the TOEFL test.

D. If you are good at reading ,you can pass the TOEFL test.

3.The real purpose of the TOEFL is to　　　　　 , according to the passage.

A. get more foreign students to study in American universities

B. let foreign students know more about American universities

C. measure one’s communicating ability in English.

D. improve foreign students’ skills of taking tests

4.Where does the passage most probably come from?

A. A website　　 　　　　 B. A lesson

C. A science book　　　　 D. A novel

高二英语阅读理解中等难度题查看答案及解析

Now, we know that if we do not get enough vitamins, we are at risk of developing a number of diseases. As a result, vitamin supplements（补品），though expensive, are popular with people who worry that they are not getting enough vitamins from the foods they eat. But contrary to what many people think, medical experts have found little evidence that most supplements do anything to improve health or protect against disease.

In fact, medical experts warn that taking too many of some vitamins can be harmful. For example, too much vitamin E can cause bleeding. People should discuss what vitamins they take with their doctors, as some vitamins can produce harmful side effects when mixed with medicines.

Experts, however, say that sometimes vitamins can help prevent disease. People who know they lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not have enough vitamin B-twelve. This is because, as people get older, their body loses its ability to take it from foods. Also, people who spend much time inside may need some extra vitamin D as the skin makes this vitamin from sunlight.

Different vitamins are found in different foods. Vitamin A is found in fish liver oil. It also is in the yellow part of eggs. Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A. Vitamin B-twelve is found in green leafy vegetables and other foods, like fruits. Vitamin K can be found in pork products.

In fact, for most people, a balanced diet can ensure enough of the vitamins our bodies need. So, it is important for us to eat a mixture of foods every day to ensure that we get enough vitamins our bodies need.

1.What is probably talked about before this passage?

A. How many vitamins a person’s body needs.

B. How many vitamins some foods contain.

C. The benefits that vitamins bring to our health.

D. What people should do to stay healthy.

2.Vitamin supplements are popular with people because ________.

A. people mistakenly think that they are good for their health

B. they contain more vitamins than the foods people eat

C. food does not provide enough vitamins people need

D. people fear that a lack of vitamins will lead to disease

3.From the passage, we can learn that medical experts advise people _________.

A. never to take any vitamin supplements

B. to depend only on food for their vitamins

C. not to take any vitamins together with medicines

D. to consult doctors before taking vitamin supplements

4.For people who lack Vitamin B-twelve, they can eat more from _______.

A. sweet potatoes　　 B. green leafy vegetables

C. pork products　　 D. eggs

高二英语阅读理解中等难度题查看答案及解析

Now, we know that if we do not get enough vitamins, we are at risk of developing a number of diseases. As a result, vitamin supplements（补品），though expensive, are popular with people who worry that they are not getting enough vitamins from the foods they eat. But contrary to what many people think, medical experts have found little evidence that most supplements do anything to improve health or protect against disease.

In fact, medical experts warn that taking too many of some vitamins can be harmful. For example, too much vitamin E can cause bleeding. People should discuss what vitamins they take with their doctors, as some vitamins can produce harmful side effects when mixed with medicines.

Experts, however, do say that sometimes vitamins can help prevent disease. People who know they lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not have enough vitamin B-twelve. This is because, as people get older, their body loses its ability to take it from foods. Also, people who spend much time inside may need some extra vitamin D as the skin makes this vitamin from sunlight.

Different vitamins are found in different foods. Vitamin A is found in fish liver oil. It also is in the yellow part of eggs. Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A. Vitamin B-twelve is found in green leafy vegetables and other foods, like fruits. Vitamin K can be found in pork products.

In fact, for most people, a balanced diet can ensure enough of the vitamins our bodies need. So, it is important for us to eat a mixture of foods every day to ensure that we get enough vitamins our bodies need.

1.Vitamin supplements are popular with people because ________.

2.From the passage, we can learn that medical experts advise people _________.

3.For people who lack Vitamin B-twelve, they can eat more from _______.

A. sweet potatoes   B. pork products   C. green leafy vegetables  D. eggs

42. What would be the best title of the passage?

A. Getting enough vitamins through a balanced diet.

B. Vitamin supplements do harm to our health.

C. Vitamins are important to our health.

D. Lacking vitamins can cause many diseases.

高二英语阅读理解困难题查看答案及解析

If you don’t have a college degree, you’re at greater risk of developing memory problems or even Alzheimer’s (老年痴呆). Education plays a key role in lifelong memory performance and risk for mental disorder, and it's well documented that those with a college degree possess a cognitive（认知的） advantage over their less educated counterparts in middle and old age.

Now, a large national study from Brandeis University published in the American Journal of Geriatric Psychiatry shows that those with less schooling can significantly make up for poorer education by frequently engaging in mental exercises such as word games, puzzles, reading, and lectures.

“The lifelong benefits of higher education for memory in later life are quite impressive, but we do not clearly understand how and why these effects last so long,” said lead author Margie Lachman, a psychologist. She suggested that higher education may encourage lifelong interest in cognitive efforts, while those with less education may not engage as frequently in mental exercises that help keep the memory agile (敏捷地).

But education early in adulthood does not appear to be the only route to maintain your memory. The study found that intellectual activities undertaken regularly made a difference. “Among individuals with low education, those who are engaged in reading, writing, attending lectures, doing word games or puzzles once a week or more had memory scores similar to people with more education,” said Lachman.

The study, called Midlife in the United States, assessed 3,343 men and women between the ages of 32 and 84 with a mean age of 56 years. Almost 40 percent of the participants had at least a 4-year college degree. The researchers evaluated how the participants performed in two cognitive areas, verbal memory and executive function --- brain processes involved in planning, abstract thinking and cognitive flexibility. Participants were given a battery of tests, including tests of verbal fluency, word recall, and backward counting.

As expected, those with higher education said they engaged in cognitive activities more often and also did better on the memory tests, but some with lower education also did well, explained Lachman.

“The findings are promising because they suggest there may be ways to level the playing field for those with lower educational achievement, and protect those at greatest risk for memory declines,” said Lachman. “Although we can not rule out the possibility that those who have better memories are the ones who take on more activities, the evidence is consistent with cognitive plasticity (可塑性), and suggests some degree of personal control over cognitive functioning in adulthood by adopting an intellectually active lifestyle.”

1.What is the text mainly about?

A. Higher education has a better cognitive advantage.

B. Better memories result from college degree.

C. Cognitive activity does a mind good.

D. Poor education has more risk of memory declines.

2.According to the result of Margie Lachman’s study, we can conclude that ________.

A. education is responsible for the lifelong memory performance and risk for mental disorder

B. education early in adulthood can be the only route to maintain your memory

C. those with higher education did better on the memory tests than those with lower education

D. an intellectually active lifestyle does help to maintain your memory

3.What do we know about the study called Midlife?

A. Participants each were given a battery to test their memory.

B. The average age of the participants are 56 years old.

C. Participants had to perform in one of the two cognitive areas.

D. One in four of the participants had a 4-year college degree.

4.Why are the findings of the Lachman’s study promising?

A. The lower educated may have the same opportunities to keep up memory.

B. We may have ways to cure the people who have memory declines.

C. Adopting a different lifestyle can control over cognitive functioning.

D. We can find out the possibility to have better memories.

高二英语阅读理解简单题查看答案及解析