I can't find my keys in my purse. I （ ）them in my office.
A、
must leave
B、
will leave
C、
must have left
D、
would have left
【正确答案】：C
【题目解析】：
情态动词，情态动词+have done，表示对过去的推测等。“我在钱包里找不到钥匙了，我一定是把它落在办公室了。”
I can't find my keys in my purse. I （ ）them in my office.
I can't find my keys in my purse. I （ ）them in my office.
must leave
will leave
must have left
would have left
情态动词，情态动词+have done，表示对过去的推测等。“我在钱包里找不到钥匙了，我一定是把它落在办公室了。”