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
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—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
It doesn’t look like rain, so you bring your umbrella with you.
#78269
A
shouldn’t
B
wouldn’t
C
can’t
D
needn’t
He ________ to the cinema last night, for he stayed with me.
#62699
A
mustn’t go
B
shouldn’t have gone
C
could not go
D
couldn’t have gone
Students ___________ remain in their seats until all the papers have been collected.
#63046
A
may
B
shall
C
need
D
can