As he approached the door, Mike looked into the room again to see if he ________
题型：不详难度：来源：
As he approached the door, Mike looked into the room again to see if he ________ anything behind.| A．left | B．had left | | C．has left | D．would leave |
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答案
| B |
解析
| B 考察动词时态。句意：当他快到门口的时候，麦克再一次看看房间是否落下什么东西。Leave behind所表示的动作发生在look into之前，因此使用过去完成时，表示在过去的某一时间或者某一动作之前就发生的动作。故B正确。 |
举一反三
Their house _____ in the big fire, so they decided to build another one.| A．has been destroyed. | B．had destroyed | C．had been destroyed | D．destroyed |
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Mr. Smith couldn’t open the door because his naughty boy ______ it from the inside.| A．would lock | B．was locking | C．has locked | D．had locked |
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They__________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.| A．had been working; are still working | B．had worked; were still working | | C．have been working; have worked | D．have worked; are still working |
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| We won"t know how the plan works till we have tried it ________. |
—Did you see Tom at the party?
—No, he _______ by the time I got there. |
A. left
B. was leaving
C. had left
D. have left |
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