Some of you may have finished unit one. _____...

Some of you may have finished unit one. _____ , you can go on to unit two.

A. If you may      B. If you do      C. If not       D. If so

高一英语单项填空中等难度题查看答案及解析

—I’m just going to finish the work off first.

—Go on if you _______.

A．can              B．may              C．must             D．shall

高一英语单项填空简单题查看答案及解析

___ you have finished your homework, you can go and play with your friends.

A. As if      B. So that        C. Even if      D. Now that

高一英语单项填空中等难度题查看答案及解析

Sometimes, you do not finish drinking your glass of water before you go to bed. 1.

But have you ever wondered if it is still safe to drink?

“If you have clean water in a clean glass, you’re fine to drink it for a day or two,” Kellogg Schwab from the Johns Hopkins University Water Institute in the US told Time.

2. That’s because after about 12 hours, the carbon dioxide (二氧化碳) in the air reacts（反应）with the water in your glass, slightly lowering its pH level.

Also, there might be more microorganisms (微生物) in your water if you leave it out overnight. Microorganisms grow more quickly at room temperature. These microorganisms can stay on your glass. 3. But as long as you clean your glasses very often, this will not be a problem.

In countries like the US and UK, people often drink water directly from the tap (水龙头).4. Most experts say that tap water has a shelf life of six months, according to Zane Satterfield from West Virginia University, US. After six months, there is less chlorine (氯) in the water and bacteria (细菌) start to grow. You’d better not drink the water otherwise you may get sick.

5. Schwab said people should be careful with them. If you leave a bottle of water under the sun or in a car for a long period of time, the plastic produces a chemical called BPA. This chemical can cause heart disease and cancer.

A.What about plastic water bottles?

B.They can make you get sick more easily.

C.Is it safe for you to drink the water later?

D.But you may find that it tastes strange.

E.Some people prefer to drink water from rivers.

F.You might want to drink it the next morning.

G.This is OK—however, tap water cannot be stored for a long time.

高一英语七选五中等难度题查看答案及解析

You may have heard adults say they are uncomfortable in the morning without a cup of coffee. One reason they may feel that way is that coffee contains caffeine(咖啡因). Caffeine appears naturally in coffee, tea, and cocoa beans, which are used to make chocolate. But now food makers are adding it to many products, from potato chips to water.

The US government is especially worried about the problem. That’s why the Food and Drug Administration (FDA) is studying the health effects of caffeine on young people. Studies show that too much caffeine can make people nervous and unable to sleep. What’s more, caffeine is habit-forming. Those who consume it regularly and stop suddenly may experience headaches and feel tired.

One of the biggest concerns is the large amount of caffeine added to so-called energy drinks, like Red Bull. A 12-ounce can of cola has about 35 milligrams of caffeine. A similar serving of Red Bull contains more than three times that amount.

The Institute of Medicine is also working on caffeine-safety measures. “Teenagers should not drink beverages that contain caffeine. They should be aware of caffeine’s effects on health and on how the brain works. Take, for example, teenagers who consume caffeine to stay awake and study for a test. They will remember less of what they just studied,” said Stallings, a member of the institute.

Companies that make products with added caffeine claim they do not advertise them to kids. However, there is no law to stop children from buying them. So the FDA needs to set limits on caffeine, especially in energy drinks. As for added caffeine in foods, the government should just say no. If not, the amount of caffeine should be printed on food labels to remind consumers. The government must do that.

Doctors say kids should avoid caffeine. If you need extra energy, try these natural boosters: eat right, exercise, and get plenty of sleep.

1.What is the US government particularly concerned about?

A. The fact that coffee contains caffeine.

B. The practice of adding caffeine to foods.

C. The measures of avoiding caffeine’s effects.

D. The practice of using caffeine to make chocolate.

2.Red Bull is listed in the third paragraph as an example of _____.

A. caffeine’s effects on health

B. teenagers’ addiction to caffeine

C. drinks which contain much caffeine　

D. people’s concern about teenagers’ health

3.Paragraph 5 is mainly about _____.

A. the measures of protecting teenagers from caffeine’s effects

B. the process of the government’s controlling the use of caffeine

C. the government’s responsibility of taking care of teenagers

D. the risk of buying products containing caffeine nowadays

4.The author may agree that _______.

A. headaches and feeling tired are common in teenagers

B. food makers don’t add much caffeine to many products now

C. caffeine is good and useful for teenagers’ study

D. getting enough sleep can make people energetic

高一英语阅读理解中等难度题查看答案及解析

You may have heard adults say they are uncomfortable in the morning without a cup of coffee. One reason they may feel that way is that coffee contains caffeine(咖啡因). Caffeine occurs naturally in coffee, tea, and cocoa beans, which are used to make chocolate. But now food makers are adding it to many products, from potato chips to water.

The US government is especially worried about the problem. That’s why the Food and Drug Administration (FDA) is studying the health effects of caffeine on young people. Studies show that too much caffeine can make people nervous and unable to sleep. What’s more, caffeine is habit-forming. Those who consume it regularly and stop suddenly may experience headaches and feel tired.

One of the biggest concerns is the large amount of caffeine added to so-called energy drinks, like Red Bull. A 12-ounce can of cola has about 35 milligrams of caffeine. A similar serving of Red Bull contains more than three times that amount.

The Institute of Medicine is also working on caffeine-safety measures. “Teenagers should not drink beverages that contain caffeine. They should be aware of caffeine’s effects on health and on how the brain works. Take, for example, teenagers who consume caffeine to stay awake and study for a test. They will remember less of what they just studied,” said Stallings, a member of the institute.

Companies that make products with added caffeine claim they do not advertise them to kids. However, there is no law to stop children from buying them. So the FDA needs to set limits on caffeine, especially in energy drinks. As for added caffeine in foods, the government should just say no. If not, the amount of caffeine should be printed on food labels to remind consumers. The government must do that.

Doctors say kids should avoid caffeine. If you need extra energy, try these natural boosters: eat right, exercise, and get plenty of sleep.

1.What is the US government particularly concerned about?

A. The fact that coffee contains caffeine.

B. The measures of avoiding caffeine’s effects.

C. The practice of adding caffeine to foods.

D. The practice of using caffeine to make chocolate.

2.Red Bull is listed in the third paragraph as an example of _____.

A. drinks which contain much caffeine

B. caffeine’s effects on health

C. teenagers’ addiction to caffeine

D. people’s concern about teenagers’ health

3.Paragraph 5 is mainly about _____.

A. the process of the government’s controlling the use of caffeine

B. the measures of protecting teenagers from caffeine’s effects

C. the government’s responsibility of taking care of teenagers

D. the risk of buying products containing caffeine nowadays

4.The author may agree that _______.

A. getting enough sleep can make people energetic

B. headaches and feeling tired are common in teenagers

C. food makers don’t add much caffeine to many products now

D. caffeine is good and useful for teenagers’ study

高一英语阅读理解中等难度题查看答案及解析

—May I go out tonight?

—Of course you can, _____ you promise to be back before 10 o’clock.

A．as soon as         B．as well            C．as long as          D．as usual

高一英语单项填空中等难度题查看答案及解析

If you go by 　　　 train,you can have quite a comfortable journey,but make sure you get 　　　　　　 _fast one.

A.the,the　　　　　　　　　 B./,a

C.the,a　　　　　　　　　　 D./,/

高一英语单项填空中等难度题查看答案及解析

There’s been a lot of talking about white-and-blue collar workers, and you may have even heard of gold collar workers, but lately a new color of collar is making its way into China’s urban vernacular(土话)—green. Green collars say no when work is life and life is work. They choose to get out of the fast lane(车道), and explore new ways of living “green”.

Living green doesn’t mean someone is working as an environmentalist, biologist or scientist. Instead it is more of a lifestyle choice. A typical green collar is well educated like a white-collar but physically tough like a blue-collar, likely born in the 70s or 80s of the last century and living in one of China’s big cities, with a monthly income well above 5,000 yuan(about US $700).

The life of a green collar may go something like this: Turn off the mobile phone after work, eat only healthy food rich in vitamins, go on hikes every weekend, and like to help the underprivileged.

Green collars even have their own club. In Beijing, the Green Collar Club is for people who share a “be happy, healthy and helpful” spirit. The club often holds charity parties and uses the donations for environmental protection and poverty relief(摆脱贫困) projects in China.

“They are successful in their careers, but do not miss the pleasures in life. They have a lot of money, but do not fall slave to it.” said Zuo Shiguang, one of the founding members of the club.

1.What is the passage mainly about?

A. Differences between white-and-blue collars and green collars.

B. The increasing awareness(意识) of environmental protection.

C. New trends of life in China’s big cities.

D. The lifestyle of green collars.

2.Green collars are living green because　　　　　　　　　　 .

A. they have a large income to use

B. they spend a lot of money and time in the open air

C. they don’t want to live an unhealthy life

D. they devote themselves to(致力于) environmental protection

3.Green collars will　　　　　　　　　　 after work.

A. prefer to be left alone B. think nothing about work any more

C. have fun with old friends D. do a lot of extra work at home

4.What’s Zuo Shiguang’s attitude towards green collars?

A. appreciative. B. doubtful(怀疑的).

C. negative(否定的). D. worried.

高一英语阅读理解中等难度题查看答案及解析

Welcome to our school. You can do a lot of things here. Come and join us.

1.You　 may have a chance to introduce your　 inventions　　 on ______.

A. Sunday　　 B. Monday

C. Wednesday　　 D. Friday

2.The person who teaches　 Computer　 Science　 is　 from______.

A. Canada　　 B. Australia

C. America　　 D. New　 Zealand

3.You　 may learn something　 about　 a disease called　 TB from　 ______.

A. Dr. West　　 B. Mr. Morison

C. Mrs. Green　　 D. Mr. Thomas

高一英语阅读理解中等难度题查看答案及解析