【题目】It’s cold and dark outside, and your bed is so warm and comfortable. Going for a run seems like such a bad idea. But before you hide your running shoes, it might be worth giving that crazy idea a go.

According to The Huffington Post, an outdoor run in winter, as opposed to one on a treadmill(跑步机), burns more calories because the body is working hard to adjust its core temperature. Furthermore, research shows that race times are faster in cold weather than in warmer temperatures and quicker runs burn more calories. Similarly, cold weather also makes the heart work harder to distribute blood through the body, making that vital muscle even stronger.

Outdoor exercise also turns up your energy and rids you of the stress and depression that build up every day. The heat and humidity in the summer can drag you down and tire you faster, but cold weather is refreshing. It adjusts you to your surroundings, making you feel alive.

Of course, the threat of smog in some built-up areas is a further hurdle to winter exercise. Heart attacks, stroke, lung cancer and asthma are all dangers of running in smog. The combination of air pollution and exercise increases the potential problems. If you do choose to run outside on smoggy days, take a path in a park or residential area to avoid car exhaust(尾气), and go early in the morning before rush hour. But staying inside on smoggy days and waiting for the next clear day to run is best.

1How does cold weather benefit runners, compared with warm weather?

A. They can run more slowly.

B. They can take in more calories.

C. Their hearts can function harder.

D. Their body temperature can get lower.

2How does summer affect runners?

A. It builds up their energy quickly.

B. It makes runners tired easily.

C. It lessens runners’ stress.

D. It causes heart attack.

3What are the runners supposed to do on smoggy days?

A. Stop driving cars.

B. Do more exercise.

C. Avoid outdoor exercise.

D. Run late in the morning.

【题目】What is language for? Some people seem to think it's for practicing grammar rules and earning lists of words—the longer the list, the better. That's wrong.Language is for the exchange(交流)of ideas and information.It's meaningless knowing all about a language if you can't use it freely. Many students I have met know hundreds of grammar rules, but they can't speak correctly or fluently(流利地).They are afraid of making mistakes.One shouldn't be afraid of making mistakes when speaking a foreign language. Native speakers make mistakes and break rules, too.Bernard saw once wrote, "Foreigners often speak English too correctly."But the mistakes that native speakers make are different from those that Chinese students make. They're English mistakes in the English language.And if enough native speakers break a rule, it is no longer a rule. What used to be wrong becomes right.People not only make history, they make language.But a people can only make its own language.It can't make another people's language. So Chinese students of English should pay attention to grammar, but they shouldn't overdo(做过头)it. They should put communication first.

1Language is used to ________.

A. express oneself B. practise grammar rules

C. talk with foreigners only D. learn lists of words

2Generally, when an American or an Englishman speaks English, he ________.

A. never makes mistakes B. often makes mistakes

C. can't avoid making mistakes D. always makes mistakes

3"Foreigners often speak English too correctly."This sentence means that ________.

A. foreigners speak correct English

B. foreigners speak incorrect English

C. foreigners speak English according to the grammar rules

D. foreigners never make mistakes when they speak English

4When we speak a foreign language, we should ________.

A. speak in Chinese way

B. speak by the rules

C. speak to native speakers

D. not be afraid of making mistakes

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