On a Saturday morning．Detective Sara was called in for an investigation．Mr．Gooding had  41  suddenly from his home．

    Sara’s assistant answered the phone and got the   42  of Mr．Gooding’s house．The assistant told Sara that Mrs．Glen was expecting   43  in half an hour at 232 Parker Avenue．Mrs．Glen was the woman who helped Mr．Gooding to look after the house．

    Sara drove there．Right away she was  44  inside by Mrs．Glen．“Detective，I’m so  45  you come．The last place I saw Mr．Gooding was in his room  46  that would be your first question，”Mrs．Glen said a little bit nervously．She then wanted to lead Sara into the room．“Up here，”Mrs．Glen called from a stair lift．Just as Sara started  47  the stairs，the front door suddenly shut．“Oh，I left the   48  open，maybe．And then the wind  49  it，”Mrs．Glen said．Again they started up the stairs．

    Sara  50  a weathervane(風(fēng)向標(biāo))through the window then．She  5l  the wind was blowing west．But it should be blowing east  52  the door was shut by the wind．Then Sara noticed for the first  53  that there was a third set of footsteps on the stairs．She  54  knew she had walked into a trap．

    Do you know  55  Sara knew she had walked into a trap?

 41．A．showed     B．slept        C．disappeared      D．played

 42．A．a(chǎn)ddress     B．size         C．date            D．height

 43．A．him        B．her          C．you            D．it

 44．A．pulled      B．forced        C．1ed           D．thrown

 45．A．glad        B．1ucky        C．a(chǎn)ngry          D．sad

 46．A．told        B．a(chǎn)sked         C．supposed        D．heard

 47．A．beside       B．in           C．down           D．up

 48．A．window      B．door         C．1ift            D．stair

 49．A．cheated     B．opened        C．closed          D．broke

 50．A．bought     B．noticed        C．put             D．stole

 51．A．a(chǎn)rgued     B．changed，     C．found           D．told

 52．A．a(chǎn)lthough    B．if            C．or              D．unless

 53．A．time        B．note         C．chance          D．step

 54．A．1uckily     B．happily       C．hardly           D．suddenly

 55．A．what       B．how           C．who            D．where

Peter's job was to examine cars when they crossed the frontier (邊界) to make sure that they were not smuggling (走私) anything into the country. Every evening he would see a factory worker coming __36__ the hill towards the frontier, __37__ a bike with grass on it. When the bike __38__ the frontier, Peter would stop the man and __39__ him take the grass off. Then he would examine the straw very __40__ to see whether he could find anything, after which he would look in all the man's pockets __41__ he let him tie (捆綁) the grass again. The man would then put it on his bike and go off down the hill with it. Although Peter was always __42 __ to find gold or other valuable things hidden in the straw, he never found __43__. He was sure the man was smuggling something, but he was not __44__ to think out what it could be.

Then one evening, after he had looked __45__ the grass and emptied the worker's pockets __46__ usual, he __47__ to him, "Listen, I know you are smuggling things __48__ this frontier. Won't you tell me what it is? I'm an old man, and today's my last day on the job. Tomorrow I'm going to retire (退休). I promise I shall not tell __49__ if you tell me what you've been smuggling." The worker did not say anything for __50__. Then he smiled, turned to Peter and said quietly, "Bikes."