"Where is my pen?""I _____ it."A.might loseB.would have lostC.should have lostD.must have lost选择原因?

问题描述:

"Where is my pen?"
"I _____ it."
A.might lose
B.would have lost
C.should have lost
D.must have lost
选择原因?

D.
must (表示肯定的推测)一定是,谅必,八成
This must be your room.
这一定是你的房间了.
Where is my pen?" 我的钢笔在哪?
"I must have lost it." 我一定是弄丢了