题目内容
【题目】（题文）By the time I got home，my mother________dinner for me．
A. cooked
B. had cooked
C. was cooking
D. is cooking
【答案】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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题目内容
【题目】（题文）By the time I got home，my mother________dinner for me．
A. cooked
B. had cooked
C. was cooking
D. is cooking
【答案】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。