阅读理解。

     Once there was a businessman. Every day he worked too much. So later he found he could not sleep

at night, but always slept in the day. He was worried and went to see a doctor. 

     "Can you help me?"he asked. "I slept very well before, but these days I can only sleep more than two

hours a night."

     The doctor looked over him carefully. At last he gave the businessman some medicine and told him to work less hard. Then he would soon be better.

     But the businessman grew worse and worse. He slept even less than before at night, and was always

falling asleep in his office. He visited to his doctor again, and it took the doctor a long time to find the

reason. The businessman's wife gave him the wrong medicine in the morning, and the one to keep him

awake at night.

1. What’s wrong with the businessman?

  ______________________________________________

2. What did the doctor do?

  ______________________________________________

3. After seeing the doctor, how was he?

  ______________________________________________

4. The businessman found the reason himself, didn't he?

  ______________________________________________

5. Why did the businessman grow worse and worse?

  ______________________________________________