题目内容：

    A couple of weeks ago，my dad，who is seventy－six，had an operation on his left knee. He came through the operation just fine and although they told him he would be in hospital for five days，he only stayed there for three days. He had a local anesthetic(局部麻醉)and was able to see and hear everything that went on in the operating room.

Later in his room，he was laughing as he told the story of hearing the hammer and saw as they took out the bone. With a smile on his face，he advised that the doctors should sharpen the saw，since he could smell the bone burning as they removed it.

The other day，one of the rubber tips on his walker wore out. Not wanting to damage the carpet or the kitchen floor，he went to his shop to find a new rubber tip. I was talking with my mom and after some time we got concerned，so I went out to see if he was OK. I walked into the shop to find him sitting on his work bench laughing. I asked what he was doing. He explained that since the rubber tip would not fit his walker，he was changing legs. It seems Mom’s walker，which she used five years ago，was broken on the top，but the legs were better than the ones on his walker.

Together my dad and I worked and worked，laughing all the time. The more trouble we had，the harder we laughed. I have been fortunate enough to have many such minutes with my dad.

1.When advising the doctors to sharpen the saw，the author’s father really intended to________.

A.be humorous

B.express his anger

C.make a complaint

D.make fun of the doctors

2.The author’s father went to his shop to________.

A.change legs

B.change his walker

C.find his wife’s walker

D.replace the rubber tip

3.Which of the following can best describe the author’s father?

A.Stupid. B.Smart.

C.Optimistic. D.Stubborn.

4.The author writes the text probably to ________.

A.warn us

B.encourage us

C.make us laugh

D.call on us to care for the disabled