2. 外语
  3. I didn’t know anything about the attributive clause, for I ______ my lesson.

I didn’t know anything about the attributive clause, for I ______ my lesson.

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问题 I didn’t know anything about the attributive clause, for I ______ my lesson.
选项 A、had not studied
B、didn’t study
C、have not studied
D、don’t study
答案A
解析 考查时态。for引导原因状语从句，主句是一般过去时，从句动作发生在主句动作之前，故用过去完成时。答案为A。
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