完形填空
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 __1__ the hill towards the frontier, __2__ a bike with a pile of goods of old straw on it. When the bike __3__ the frontier, Peter would stop the man and __4__ him take the straw off and untie it. Then he would examine the straw very __5__ to see __6__ he could find anything, after which he would look in all the man’s pockets __7__ 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 __8__ to find gold or other valuable things __9__ in the straw, he never found __10__. He was sure the man was __11__ something, but he was not __12__ to think out what it could be.
