从B栏中找到A栏各词的释义。

　　When a big ship is in very rough(不平坦的) sea, it has to be able to bend(弯) a little, otherwise it may break in two. If one end of the ship is on the top of one huge wave, and the other end is on the top of another, with the middle of the ship hanging in between; or if one huge wave comes up under the middle of the ship, leaving the two ends hanging, the ship's own weight will break its back if it is quite stiff(硬的).

　　To make a big ship elastic(有弹性的) enough to avoid (避开) this danger, it has joints where the sections of the ship come together above the water-line, and these joints (连接处) open and shut slightly as the waves lift one section(部分) of the ship or another. This is enough to save the ship from breaking into pieces.

　　One day a sailor was walking along a passage-way in a big ship during a storm when he was surprised to see a boy sitting comfortably in a chair at the end of the passage-way, which was opposite one of the ship's joints. The boy had a bag of nuts beside him, and every time the ship was lifted by a wave and the joint opened, he put a nut in it. As the ship came down again, the joint closed and cracked(压碎) the nut, gently but firmly. The boy then took it out and put the next one in as the joint opened again.

1．What does a big ship have to do when it is in very rough sea?

2．If one end of the ship is on the top of one huge wave, and the other end is on the top of another, with the middle of the ship hanging in between, what will happen to the ship if it is quite stiff?

3．Why does a big ship have joints?

4．What do these joints do?

5．Where was a sailor walking during the storm in this story?

6．What was he surprised to see?

7．What did the boy have beside him?

8．What did he do?

9．How was the nut cracked?

10．What did the boy do then?

　　Mr. Smith moved to another town, and soon he needed a new doctor. He went to see one. He sat down in the waiting-room and looked around. The doctor's degree（学位证书）was on the wall. Suddenly Mr. Smith remembered there had been a classmate with the same name in his class at school, and he had become a doctor! When he went in to see the doctor, he remembered a young, handsome（英俊的）student, and was sorry to see how old and heavy this man looked. He said to him,“Good morning, doctor. Did you go to King High School?”“Yes, I did.”“Were you there from 1942 to 1946?”Mr. Smith asked.“Yes, I was,”the doctor answered.“How did you know?”Mr. Smith laughed and said,“You were in my class!”“Oh!”the doctor said and looked at him carefully for a few seconds.“What were you teaching?”

[　　]

[　　]

[　　]

[　　]

[　　]