________ 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
________ from the bright smile on his face, he ________ in passing the job interview.
A．Judging; must have succeeded
B．Judging; might succeed
C．Judged; must have succeeded
D．Judged, might succeed
—Please don't tell anybody.
—I ________. I promise.
A．can't B．don't
C．won't D．mustn't
—Nowadays children have more freedom.
—I agree. They ________ do what they like.
A．need B．must
C．should D．can
