The kitchen curtains are easy to get dirty, a...

The kitchen curtains are easy to get dirty, and they require　 ___at least once a week.

A. wash　 　　　　　 B. washed

C. washing　　　　 D. to wash

高二英语单项填空中等难度题查看答案及解析

How dirty the windows are! They really require _______.

高二英语单项填空简单题查看答案及解析

Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble．

高二英语单项填空中等难度题查看答案及解析

课文填空，一空一词

1.The poems may not ________ ________ and even seem contradictory, but they are easy to learn and recite.

2.First, you can become ________ addicted to nicotine, which is one of the hundred of chemicals in cigarettes.

3.So when the drug leaves your body, you get ________ symptoms.

4.Neither did I know that my cigarette smoke could affect the health of ________.

高二英语用适当的词完成句子中等难度题查看答案及解析

Summers around the world are already warmer than they used to be, and they are going to get dramatically hotter by the century’s end if carbon pollution continues to rise. That problem will be felt most acutely in cities.

The world’s rapidly growing population coupled with the urban “heat island” effect, which can make cities up to 7.8℃ warmer than the countryside, adds up to a recipe for dangerous and potentially deadly heat.

Currently, about 54 percent of the world’s population lives in cities, and by 2050 the urban population is expected to have grown by 2.5 billion people. As those cities get hotter, weather patterns may shift and make extreme heat even more common. That will, in turn, threaten public health and the economy.

Under the high-pollution situation, currently mild Ottawa, Canada could have the tropical climate of Belize City by 2100. Mountainous Kabul, Afghanistan could feel like coastal Colombo, India. Already hot Cairo, Egypt could feel like its sweltering (闷热的) neighbor, Abu Dhabi.

The average land temperature is projected to rise 4.8℃, but due to the differences in geography, some cities will warm much more. Sofia, Bulgaria is predicted to have the biggest overall temperature shift, with temperatures rising nearly 8.4℃ by 2100. That would make its summers more like in Egypt.

The average summer temperature in Khartoum, Sudan is projected to skyrocket to 44.1℃ if carbon pollution continues to be unchecked. That shift emphasizes that unless carbon pollution is limited, the planet could be headed toward a state that humans have never experienced.

Dealing with less extreme heat makes adaptation easier and less expensive, and given that choice, perhaps it’s no surprise cities are leading the charge on climate change. They face the worst impacts of extreme heat and are home to billions. That’s why thousands of mayors from around the world have banded together and promised to reduce their emissions. That includes lots of U.S. cities committing to meet the Paris Agreement goals after President Trump announced he was pulling the U.S. out of the agreement.

1.What may happen by the end of the century according to the passage?

A. Carbon pollution will be worse and worse.

B. The world’s population living in cities will decline.

C. The temperature in cities will be too high to bear in summer.

D. The economy and population will be impacted severely by pollution.

2.Which city mentioned in the passage will have the greatest climate change?

A. Ottawa, Canada.　　 B. Sofia, Bulgaria.

C. Khartoum, Sudan.　　 D. Kabul, Afghanistan

3.The underlined word “skyrocket” in the sixth paragraph probably means “　　　　 ”.

A. rise rapidly.　　 B. change gradually

C. reverse completely　　 D. drop naturally

4.What can we learn from the last paragraph?

A. Dealing with the climate problems right now is hard and expensive.

B. Officials are unwilling to deal with climate change.

C. Extreme heat will have no impact on the climate in the countryside.

D. Many U.S. cities are dealing with climate problems actively.

高二英语阅读理解困难题查看答案及解析

—I hate cities . The roads are dirty and they are always crowded.

—Do you know the world’s population has grown to_________？

高二英语单项填空简单题查看答案及解析

It's 3 a.m. and you're wide awake for the second night in a row. You get up and come to the kitchen for some warm milk that mom says will put you to sleep. So why are you eating a bowl of ice cream with a side of cookies?

You may have heard about two hormones (荷尔蒙) that control our urge to eat: leptin and ghrelin. "The 'l' in leptin stands for lose: It controls appetite and therefore contributes to weight loss," said sleep specialist Dr. Raj Dasgupta, the associate program director of the Sleep Medicine Fellowship at Keck Medicine of USC. "The 'g' in ghrelin stands for gain: This fast-acting hormone increases hunger and leads to weight gain." When you don't have enough sleep, research shows, ghrelin levels increase while leptin lakes a nose dive. The result is an increase in hunger.

But food is food, so that doesn't explain why we want candy instead of carrots. To answer that, you have to look at another system of the body: The endocannabinoid (内源性大麻素) system. It manages everything from sleep to appetite to pain and more.

In a study published in 2016, Hanlon compared the circulating levels of 2-AG, one of the most abundant endocannabinoids,in people who got four nights of normal sleep (more than eight hours) with those in people who only got 4.5 hours. People who were sleep-deprived (缺乏睡眠) reported greater increases in hunger and appetite and had higher afternoon concentrations of 2-AG than those who slept well. They also had a rough time controlling their urges for high-calorie snacks.

All of this research is so new that science doesn’t yet know how it all fits together or what can be done about it. And that brings us to the bottom line: There's not going to be a pill any time soon for the sleep-deprived junk-food people. Instead, you'll have to do what the doctor says to reduce your improper cravings (渴望) in the middle of the night: get more sleep.

1.How does the author develop paragraph 2?

A.By giving examples. B.By making comparisons.

C.By following time order. D.By making explanations.

2.What did the study published in 2016 find?

A.Most 2-AG is produced during sleep.

B.Normal sleep makes levels of 2-AG go up.

C.High levels of 2-AG can result in strong appetite.

D.Lack of sleep decreases appetite for high-calorie food.

3.What may be a solution to the problem of eating junk-food at midnight?

A.Buying a pill from the hospital. B.Visiting the doctor at midnight.

C.Getting normal amount of sleep. D.Checking the levels of 2-AG often.

4.What can be the best title for the text?

A.Lack of sleep makes you crave junk food.

B.2-AG controls your hunger and appetite.

C.Enough sleep is important in losing weight.

D.Leptin and ghrelin together make you sleepy.

高二英语阅读理解中等难度题查看答案及解析

Tibetan people are friendly and easy to get along with. However, Tibetans have different ways of behavior in many aspects due to their unique culture and religion. Be sure to respect local customs and be polite.

Don’t enter a monastery without permission. Don’t smoke in monasteries. Don’t touch Buddha statues, religious objects or prayer flags. Walk around monasteries (寺院), temples, dagobas, Mongolian cairns (Mani piles) and other religious structures in clockwise order with the exception of the Bon sites.

Don t step on the threshold when entering a tent, house, or monastery. Don’t touch the head of a Tibetan. The head is considered as a sacred part of the body. Remember to cross your legs when you are asked to have a seat. Don’t stretch your legs with feet pointing to others.

Don’t drive away or hurt eagles. Eagles are considered holy birds in the hearts of Tibetan people. Don’t disturb or injure cows or sheep with red, green or yellow ribbons because they are Tibetan sacrifice to worship gods.

Don’t take photos without permission. You’d better ask for permission before taking pictures of Tibetan people. Most Tibetan monasteries are not allowed to take pictures or you need to pay.

Tibetan people are getting more used to habits of foreigners and being more tolerant due to rapidly developing tourism in Tibet. However, we still hope you can show respect to Tibetan traditions and behave well since their unique lifestyle is part of the charm of Tibet.

1.What are forbidden to do in a religious place?

A. Take a photo.　　 B. Talk with Tibetans.

C. Walk around.　　 D. Make a prayer.

2.Why can’t you drive or hurt eagles?

A. Tibetan people are animal lovers.

B. Eagles are holy birds to Tibetans.

C. Tibetans use them to worship gods.

D. They are protected by local laws.

3.Who are the intended readers of the text?

A. Teachers.　　 B. Locals.

C. Tourists.　　 D. Reporters.

高二英语阅读理解中等难度题查看答案及解析

Most dogs have an easy life in the U. S. They eat, play, get attention from their　　 _________and sleep. But some dogs work hard. They are called guide dogs. Guide dogs help___________people move from place to place safely.

Guide dogs and their owners are a___________. Guide dogs don’t lead the owners, and their owners don’t___________control the guide dogs. They work together. The guide dogs don’t know where the owners want to go, so they___________the owners’ instructions. The owners can’t see the obstacles (障碍物) along the way, so the dogs make decisions for the___________of the owners. Guide dogs stop at all crossroads before___________a street. They don’t see color, so they don’t know if the light is red or　 ___________The owners decide if it is time to cross the street by listening to the sound of　　 ___________. The dogs help the owners get on a bus or train. They learn to____________many tasks.

Most guide dogs are very____________and friendly. A guide dog needs to work　　 ____________distraction(分心) in noisy places, bad weather, crowds of people, and____________situations. When you see a guide dog, it is important that you____________that the dog needs to focus on (集中于）its job. Don’t pet or talk to the dog.____________is very difficult, and it requires a dog’s full____________Guide dog training lasts about five months. Only about 72 percent of dogs that enter the training program “graduate”. Those that graduate bring their owners valuable____________and love. In other dog training programs, trainers use____________as a reward. In guide dog training, the trainers don’t use food. They use physical affection (爱抚). This is____________a guide dog sometimes takes the owner to a restaurant. It must lie____________at the owner’s feet without wanting to eat.

1.A.friends B.parents C.owners D.neighbors

2.A.normal B.blind C.elderly D.deaf

3.A.family B.couple C.class D.team

4.A.obviously B.completely C.exactly D.immediately

5.A.follow B.read C.understand D.repeat

6.A.preference B.health C.safety D.judgment

7.A.crossing B.observing C.mapping D.leaving

8.A.dark B.green C.bright D.yellow

9.A.traffic B.dogs C.music D.steps

10.A.give up B.take off C.look for D.carry out

11.A.small B.clever C.noisy D.attractive

12.A.beyond B.against C.over D.without

13.A.pleasant B.simple C.difficult D.serious

14.A.ignore B.feel C.touch D.recognize

15.A.Thinking B.Deciding C.moving D.Guiding

16.A.attention B.time C.service D.memory

17.A.advice B.experience C.support D.help

18.A.water B.money C.food D.toys

19.A.when B.why C.because D.how

20.A.quickly B.patiently C.carefully D.gently

高二英语完形填空困难题查看答案及解析

Nursery rhymes are attractive to children because they are easy ________ and sound funny.

A. remembering　　 B. to be remembered

C. to remember　　　　 D. remembered

高二英语单项填空中等难度题查看答案及解析