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Notuntilhefailedtheexam,

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問題詳情:

Notuntilhefailedtheexam,

Not until he failed the exam,______ he ______ he wasted too much time playing.

A. do; realize         B. did; realize      C. has; realize        D. /; realized

【回答】

 B

知識點:倒裝與省略

題型:選擇題

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