I can't find the key to m

I can't find the key to my office,I( )have lost it on my way

4个回答

选C,译文是：我找不到我的钥匙,一定是掉在回家的路上了.
本题考的是虚拟语气的用法.
A：would have done是一般时的用法,不表推测.
B、D：should/ought to have done的用法是一样的,都表示本该做的事却没有做
C：must have done：表示推测,意思是“…一定在…”