Henry's job was to examine cars which crossed the frontier to make 21______that theywere not smuggling （走私) anything

Henry's job was to examine cars which crossed the frontier to make 21______that theywere not smuggling (走私) anything into the country. Every evening, except at weekends,he 22______ see a factory worker coming up the hill towards the frontier, pushing a bicyclewith a big load of old straw on it. When the bicycle reached the frontier, Henry 23______ to stop the man and make him take the straw off and untie it. Then he would examine the24______ very carefully to see if he could find anything, after which he would look in all theman's pockets 25______ he let him tie the straw again. The man would then put it on his bicycle and go off down the hill with it. Although Henry was always 26______ to find gold or jewelry or other valuable things hidden in the straw, he never found any.

Then one evening, after he had looked 27______ the straw as usual, he said to him,"Listen. 1 know that you are smuggling things across this frontier. Won't you tell me what it is that you are bringing into the country so 28______ ？ I' m an old man, and today's my last day on the job. Tomorrow I' m going to 29______. 1 promise that 1 shall not tell anyone if you tell me what you've been smuggling." The factory worker did not say anything for 30______.Then he smiled, turned to Henry and said quietly, "Bicycles. "

21. A. known B. clear C. obvious D. sure

22. A. would B. must C. might D. should

23. A. had B. ought C. used D. wanted

24. A. bicycle B. hill C. straw D. worker

25. A. when B. before C. while D. as

26. A. thinking B. suspecting C. expecting D. insisting

27. A. thoroughly B. through C. down D. up

28. A. carefully B. successfully C. obviously D. silently

29.A. return B. retreat C. retire D. rest

30. A. short while B. a period C. few minutes D. some time