Question

【题目】Not until some students failed in the exam___how much time they had wasted

A.didn’t they realize

B.did they realize

C.they didn’t realize

D.they realize

Answer 1

【答案】B

【解析】句意：有些学生直到考试失利了才意识到他们浪费了多少时间。not until位于句首时，该句子应该采用部分倒装结构。