Itwasonlybeforehefinishedtheassignmentthat

問題詳情：

It was only before he finished the assignment that ____ the answer to the last two questions.

     A. he thought out      B. did he think out  C. he did thought out  D. thought out he

【回答】

A

知識點：一般過去時及其被動式

題型：選擇題