题目内容
The workers ________ busily when the boss came to look for something she ________ in the office.
[ ]
A.had worked; had left B.working; had left
C.were working; had eft D.had worked; left
答案:C
解析:
解析:
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when the boss…给出一个过去时间,主句用过去进行时态描写一个动作正在进行。 |
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