【题目】请先阅读下面的短文,掌握其大意,然后用方框中所给词的适当形式填空。每个词限用一次。

Most of us use alarm clocks to wake up at the right time for school or work. We look at our watches 1the right time for the bus or train. However, there is also a right time to eat, sleep, exercise and take medicine. We can’t look at a clock for the right time for these activities. We must listen to the clock 2 our bodies: the biological clock.

Barbara Wells exercised every morning. She woke up at 6:00 a. m. She ran about two 3before she went to work. But Barbara’s legs and back started to hurt. She did some exercise4she ran. But her legs and back still hurt. She ran slower, but the pain didn’t stop. Barbara talked to her doctor. The doctor said, "Try to exercise 5in the day. Don’t run in the morning. 6is the time when your body is at the right temperature for exercise after work." Her legs and back did’t hurt anymore.

Today , doctors are learning7about chronobiology( 生物钟学), the study of biological locks. They are learning about the importance of time for our bodies. For example, it is best for people to go to sleep on time every night and to eat only when theyre hungry. Also, doctors 8that some illnesses, such as heart attacks, occur (发生) most often in the morning. This information tells us that the best time to take9medication(药物) may be at night. When patients take them at night, they may 10 heart attack in the morning.

Many doctors believe chronobiology can help us live healthier lives. It may be the right time to listen to these doctors!

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