5. A. so　　 　　　　 B. as　　　 　　　　 C. at　　　 　　　　　 D. because

4. A. in　　 　　　　 B. on　　　 　　　　 C. of　　　 　　　　　 D. at

3. A. doesn’t　 　　　 B. don’t　　 　　　　 C. didn’t　 　　　　　　 D. wasn’t

2. A.To 　　　　　　 B. At　　　 　　　　 C. In　　　 　　　　　 D. with

1. A. got off 　　　　 B. gets off 　　　　　 C. get off 　　　　　　 D. get on

20．D。本句说明这个工人回答彼得的问题之前沉默了一会儿。A选项应用a moment； C选项表示某一点时间； D选项表示一段时间或一会儿，为正确选项。

21

A strange thing happened to Henry yesterday. He was on a bus and to __1__. So he stood up and rang the bell. __2__ make sure the driver heard him, he rang it twice, but the bus __3__ stop. And the conductor came and shouted __4__ him.

The conductor was __5__ angry and spoke __6__ fast that Henry didn’t understand __7__. The bus stopped at the next bus and Henry got off. As he got off he heard someone said, “ I think he __8__ a foreigner.”

When Henry got __9__, he told his wife about it.

“ __10__ times did you ring the bell?” his wife asked.

“ Twice,” said Henry.

“ Well, that’s the signal (信号) __11__ the driver __12__ on.” His wife explained, “only the conductor __13__ to ring the bell twice. That’s why the conductor __14__ so angry!”

Henry nodded(点头). “ __15__,” he said.

19．B。根据句中否定词not 及文意应选anyone。

18．C。因为今天是彼得最后一天上班说明明天他就要退休retire。

17．C。“on the job”为一常用短语。意为“执行公务”。

16．C．这里应选择一个介词构成介词短语在句中做状语。介词past 表“经过”； across 强调“从一边到另一边”；而into 表示“进入到……里面”。 根据文意across应为正确选项。