题目内容：

Recently Dr. Cleiman has proved that everyone has a daily energy cycle. During the hours when you labor through your work, you may say that you are “hot”. That is true, the time of day when you feel most energetic (full of energy) is when your cycle of body temperature is at its peak(top). For some people the peak comes during the forenoon(上午前). For others it comes in the afternoon or evening. No one has discovered why this is so.

Much family quarrelling ends when husbands and wives realize what this energy cycle means and which cycle each member of the family has.

You cannot change your cycle, but you can learn to make your life fit it better. “Habits can help,” Dr. Cleiman believes. If your energy cycle is low in the morning but you have an important job early in the day, rise before your usual hour, and then you will work better at your low point.

Get off to a slow start which saves your energy. Get up with a lazy yawn(哈欠) and stretch. Sit on the edge of bed before putting your feet on the floor. Avoid the troublesome searching for clean clothes by laying them out the night before.

1. Dr. Cleiman did not explain in the passage ___________.

A. how people can make their life fit their cycle   

B. whether everyone has a daily cycle or not

C. why people have their energy cycle of body at different times

D. what will happen in the family if the couple fail to realize which cycle each member has

2.For what reason may husbands and wives quarrel with each other?

A. Either of them gets up late in the morning. 

B. Husbands and wives have different cycles of energy.

C. Either of them wants to change the cycle of the other’s.

D. They do not know which cycle they themselves have.

3.According to the passage,____________.

A. one should get up earlier if he wants to work better at his low point in the morning

B. one can change his cycle

C. whenever you feel hot, your energy cycle reaches the highest

D. your cycle must be in the morning if you can get up early

4.Which of the following can save your energy in the morning?

A. Getting up late.            B. Jumping out of bed as quickly as possible.

C. Looking for clean clothes.    D. Sitting for a while before getting out of bed.

5. Which of the following statements is wrong?

A. If you know your cycle you can make good use of time.

B. If you know your cycle you can change it to fit your life.

C. Father and son do not necessarily have the same cycle.

D. Having a habit of doing something can make people affected less by their energy cycle.