题目内容
【题目】 (2015·天津) Only when Lily walked into the office ________ that she had left the contract at home.
A. she realized B. has she realized
C. she has realized D. did she realize
【答案】D
【解析】句意:只有当莉莉走进办公室的时候,她才意识到她把合同忘在家里了。本题考查"Only+时间状语从句"位于句首时,主句要主谓倒装。根据时态和句意可知选D。
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