An old man went to a doctor to ask some questions about his wife's hearing, He was worried that she was going deaf, as she seemed to be having a hard time hearing the old man 1 . The doctor asked him to have a 2 to find out how bad her hearing was. 

"Stand far behind her and ask her a question. If she doesn't answer, move a little 3 and ask again. Keep doing this until you can find out how far away she can hear 4 " The doctor said "5 she can't hear you until you are quite close, she might have a hearing problem. " The old man was so 6 to finally solve(解决) the problem

In the evening the old man 7 his home. He saw his wife was cooking dinner. While standing about 15 meters behind her, he asked. "What's for dinner, dear?' But his wife didn't answer. 

Then he stood about 10 meters 8 her He asked her again, but she 9 did not answer. about 15 meters behind her, He did the same thing for 10 two times. But he got no answer again At last, the distance is only 1 meter He asked at the top of his voice. 

His wife answered angrily, "Why did you ask me so many times? I told you that we're having noodles for dinner".