题目内容
The students ___ busily when Miss Brown went to get a book she ___ in the office.
A. had written ; left B.were writing ;has left
C.had written ;had left D.were writing ;had left
【答案】
D
【解析】
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题目内容
The students ___ busily when Miss Brown went to get a book she ___ in the office.
A. had written ; left B.were writing ;has left
C.had written ;had left D.were writing ;had left
D
【解析】