Question

【题目】______ then did they understand that it was their own fault.

A.TillB.By thenC.SinceD.Only

Answer 1

【答案】D

【解析】

考查部分倒装。句意：只有那时他们才明白这是他们自己的错。A. Till直到；B. By then到那时候；C. Since因为；自从；D. Only只有，位于句首时主句用部分倒装。根据下文did they understand为部分倒装，可知选D。