C. Because Sam didn’t know how to do repairs.

　　答案: A

　　听力材料:

　　Sam and Joe were astronauts. There was once a very dangerous trip and the more experienced astronauts knew there was only a small chance of coming back alive. Sam and Joe, however, thought it would be exciting though a little dangerous. “We’re the best men for the job.” They said to the boss, “There may be problems, but we can find the answers.” “They’re the last people I’d trust,” thought the boss, “but all the other astronauts have refused to go.”

　　Once they were in space, Joe had to go outside to make some repairs. When the repairs were done, he tried to get

　　back inside the spaceship.

　　But the door was locked.

　　He knocked but there Was no answer. He knocked again, louder this time, and again no answer came. Then he hit the door as hard as he could and finally a voice said, “Who’s there?”

　　“It’s me! Who else could it be?” shouted Joe. Sam let hint in all right but you can imagine that Joe would never ask to go on trip with Sam again!

　　【典型习题导练】六

　　第一部分:听力(共两节，满分30分)

　　第一节(共5小题；每小题1.5分，满分7.5分)

　　听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C、三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。

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