题目内容：

    Running seems easy enough: Just grab a pair of sneakers and put one foot in front of the other, right? Well, anyone who struggled to get through a mile knows it’s not quite that simple. We’ve asked experienced runners to tell us something wrong they did when they started running. The following are some of their answers.

I got excited and signed up for a half-marathon with a few more experienced runner friends, but I wasn’t adequately prepared and didn’t train efficiently. I ended up with blisters(水泡) on my feet. I couldn’t wear shoes for two days!

—Cali Lavey

I have always been athletic and I have never been badly injured, but one day I felt a slight pain in my knee. I ignored it for a month until I realized I was having a hard time putting weight on my right leg. I finally went to a doctor. It took four months of weekly physical therapy(治疗) to heal. I shouldn’t have done that.

—Arnold

My biggest mistake was treating running like soccer practice: If I wasn’t exhausted by the end of practice, I felt as though I didn’t work hard enough. I run all of my runs at 80 percent effort, or the equivalent of what I now call tempo runs (节奏跑). I wasn’t warming up to the pace or cooling down effectively.

—Kate

I decided to go out for a run during the hottest part of the day. At the time, I told myself that it would be refreshing to sweat a little, but I didn’t bring adequate water. I returned feeling completely rundown, dehydrated (脱水的), and exhausted. If you must go out on a run during unfavorable weather, wear proper suits and bring enough water to keep you feeling strong.

— Sarah

1.Why did Cali suffer from her half-marathon?

A. She ran all the way barefoot.

B. She didn’t get ready for it.

C. She ran with experienced runners.

D. She did not have self-confidence.

2.What did Arnold regret doing?

A. Thinking he would never get injured.

B. Putting heavy weight on his right leg.

C. Spending about four month s treating his knee.

D. Waiting for so long to get his knee examined.

3.Who didn’t get enough water when running?

A. Cali    B. Arnold    C. Kate    D. Sarah

4.The examples of the four runners mainly show that ________.

A. we should warm up before running

B. we should bring enough water when running

C. we shouldn’t think running is very easy

D. we shouldn’t ignore any pain when running