There was something wrong with the network，or the e-mail____ earlier.
#62904
A
could have been sent
B
might be sent
C
need have been sent
D
must be sent
推荐题目
--Is Professer Smith giving the speech today?--It ________ be him. He is abroad right now.
#62935
A
mustn't
B
needn't
C
won't
D
can't
——TV and computer are so popular these days.——Yes, they can ____ our eyes to the outside world.
#77015
A
call up
B
open up
C
turn up
D
take up
—Will you stay for some more days? —Sorry, I_____. My mother called to ask me to go back at once.
#77550
A
mustn’t
B
may not
C
can’t
D
wouldn’t
—How did you like the concert last night ?—I enjoyed it very much, but the dancers _____ a better job．
#63517
A
could have done
B
must have done
C
could do
D
had done
—Jenny，how did your math exam go?—I thought I ________，but in fact I came in the top 10% in the class.
#63590
A
might have failed
B
couldn’t have failed
C
should have failed
D
mustn’t have failed