A young man could not sleep well every night.He was very worried.One day，he went to see the doctor.The doctor looked him over carefully.But there was nothing wrong with him .The doctor told him to count from one to ten again and again.“Keep doing it until you fall asleep，”the doctor said.

　　After a few days，the young man came to the doctor again.But to his surpise，the doctor found the young man was even worse than before.

　　“Didn't you count as(按照)I told you?”the doctor asked.

　　“Yes，I did，”the young man said，“But every time when I reached eight，I could not help jumping(情不自禁地跳起来)from bed.”

　　“But why?”the doctor wanted to know.The young man answered，“I am a boxer(拳击运动员).”

　　1)The young man had to go to see the doctor because ______ .

　　2)—Was there anything wrong with the young man ?

　　—No， ______ .

　　3)What did the doctor tell the young man,to do? ______ .

　　4)—Why did the young man come to see the doctor again ?

　　—Because ______ .

　　5)The young man could not help jumping from bed when he reached eight because ______ .