问题
选择题
Only when I put myself in their position ________ they were more miserable than me.
A.I had known
B.had I known
C.I knew
D.did I know
答案
答案:D
句意:只有当我设身处地为他们想的时候,我才知道,他们比我更加痛苦。only+状语从句位于句首时,主句要用部分倒装,know这个动作发生在put之后,所以不能用过去完成时,因此选D。