By the time I got home.my mother dinner for me．A. cookedB. had cookedC. was cookingD. is cooking B [解析] 由“by the time+表示过去的时间状语从句可知.主句应该用过去完成时. 题目和参考答案——青夏教育精英家教网—

题目内容

（题文）By the time I got home，my mother________dinner for me．

A. cooked

B. had cooked

C. was cooking

D. is cooking

B 【解析】由“by the time+表示过去的时间状语从句”可知，主句应该用过去完成时。

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