题目内容
【题目】I failed in the final examination last term and only then __________ the importance of study.
A. I realized B. I had realized
C. had I realized D. did I realize
【答案】D
【解析】句意:上学期期末考试我不及格,只是在那时我才意识到学习的重要性。only修饰状语then位于句首时需使用部分倒装,本句的时态应使用一般过去时。
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