He must have had very important business to do, or （) in such bad weather.

He must have had an accident, or he _____ then

A:would have been here

B:would be here

C:should be here

D:had just had

He must have had an accident，or he ______ then．

A.would have been here

B.should be here

C.had to be here

D.would be here

A.could have had

B.should have had

C.might have had

D.must have had

A.would get

B.would have got

C.could get

D.must have got

A.must have failed

B.would have failed

C.could have failed

D.should not have failed

A.was lying

B.had lain

C.has been lying

D.must have lain

Had he worked harder, he __________ the exams.

A) must have got through B) would have got through

C) permitted are freshmen D) are permitted freshmen

A.must have

B.must have had

C.must have been

A.must have been

B.must he

C.was to be

D.had to be

A.go

B.have gone

C.went

D.had gone