Every time she was in trouble, she went to him for help, as he said he ________ do anything for her.
A．should B．must
C．would D．might
—Where did you get The Frog written by Mo Yan?
—I picked it up from a bookshop online if you ________ know.
A．must B．will
C．can D．shall
When I lived with my roommates in the university, we ________ often talk into the night.
A．might B．could
C．should D．would
________ your letter, I would have set off two days ago.
A．If I could have received
B．Should I receive
C．If I received
D．Had I received
You ________ in person; a telephone would have been enough.
A．couldn't have come B．needn't have come
C．shouldn't have come D．mustn't have come
I felt surprised that anyone of his intelligence ________ such an easy test.
A.might have failed B．could have failed
C.should have failed D．must have failed
