1. (2023八上·萍乡期中)  阅读理解

You may know that exercise can help you lose weight. However, it has a lot of other good effects(影响) too. Even if you are healthy, there are several reasons that you should exercise.

First, exercise can give you energy(精力). When you are tired during the day, take a walk or go for a run. Scientists looked over 70 different studies about exercise and tiredness. Over 90 percent of the studies showed the same result: Exercise increased(增加)energy and reduced tiredness.

Second, exercise can help you sleep better. Not having enough sleep is one of the main causes of stress(精神压力). Exercising raises your body temperature(温度). Then it goes back to normal(正常) about five to six hours later. You become sleepy at this point because the drop in temperature tells your body that it's time to sleep.

Also, exercise can reduce stress and worry. Doing sports for 20 minutes can make you feel relaxed. How? When you exercise, you have to focus on(专注于) your body, so you can't think about your stressful thoughts.

Exercise can improve your life in so many ways. It can make you feel better, look better, and do more. So why are you sitting there reading? Go out and exercise!

1. （1） How many studies might show exercise can give you energy according to the passage?

   A . 70. B . 63. C . 60. D . 55.
3. （2） Which of the following may cause stress according to the passage?

   A . Taking a walk during the day. B . Doing sports for 20 minutes. C . Not having enough sleep. D . Focusing on your body.
5. （3） Which of the following best shows the structure of the passage?

   A . B . C . D .