题目内容：

Peter's job was to examine cars when they crossed the frontier to make sure that they were not smuggling anything into the country. Every evening he would see a factory worker coming ______ the hill towards the frontier， pushing a bike with a pile of goods of old straw on it. When the bike ______ the frontier， Peter would stop the man and ______ him take the straw off and untie it. Then he would examine the straw very ______ to see ______ he could find anything， after which he would look in all the man’s pockets ______ he let him tie the straw again. The man would then put it on his bike and go off down the hill with it. Although Peter was always ______ to find gold or other valuable things ______ in the straw， he never found ______. He was sure the man was ______ something，but he was not able to think out what it could be.

Then one evening， after he had looked ______ the straw and emptied the worker's pockets ______ usual， he said to him，“Listen，I know you are smuggling things ______ this frontier. Won’t you tell me what it is?I'm an old man， and today’s my last day on the ______. Tomorrow I'm going to retire. I promise I shall not tell anyone if you tell me what you’ve been smuggling.” The worker did not say anything for ______. Then he smiled， turned to Peter and said quietly，“Bikes.”

1.A. towards    B. down    C. to    D. up

2.A. arrived    B. appeared    C. came    D. reached

3.A. ask    B. order    C. make    D. call

4.A. carefully    B. quickly    C. silently    D. horribly

5.A. that    B. where    C. how    D. whether

6.A. before    B. after    C. firs t    D. so

7.A. lucky    B. hoping    C. thinking    D. wondering

8.A. had been    B. hidden    C. hiding    D. have been

9.A. nothing    B. something    C. everything    D. anything

10.A. taking    B. smuggling    C. stealing    D. pushing

11.A. through    B. thoroughly    C. upon    D. up

12.A. like    B. more    C. then    D. as

13.A. cross    B. past    C. across    D. into

14.A. thing    B. work    C. job    D. duty

15.A. moment    B. long time    C. sometime    D. some time