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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科目：高中英語(yǔ) 來(lái)源： 題型：

On the street I saw a studen _____ I thought was English.

　 A. whom 　 B. who

　 C. the one 　 D. he

 

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