They have got lost, or had an accident.
#62726
A
can
B
might
C
must
D
mustn’t
推荐题目
The haze or smog was so serious that the winter running _________.Some students complained as they ran
#62272
A
could have cancelled
B
should have cancelled
C
must have been cancelled
D
ought to have been cancelled
--The man in a black suit _______ be our youth worker. -- I’m sure it _____ be him. I saw him in the laboratory building some minutes ago.
#74624
A
must; can’t
B
can; mustn’t
C
can; could
D
must; won’t
--Do you think Jack will lend us a hand?--He is the last one to help others. He _____lend his hand, though.
#62966
A
can
B
must
C
should
D
might
— She looks rather upset. She the exam.— I guess so. It’s very difficult after all.
#62573
A
must have failed
B
can fail
C
would have failed
D
should fail