-Listen! Is Mary playing the piano in the room? --No. It ________ be Mary. She has gone to Hong Kong.
#77454
A
may not
B
needn’t
C
can’t
D
mustn’t
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—Jim，you said you'd lend me your MP5.—I'm sorry I forgot my promise but you ________ have it next Saturday.
#62478
A
must
B
may
C
need
D
shall
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
Our playground is not so tidy and beautiful as before, students must ____ dirty things on it.
#74989
A
be stopped to throw
B
be stopped throwing
C
stop to throw
D
stop from throwing
The new supermarket announced that the first to purchase goods on the opening day_______ get a big prize.
#62220
A
must
B
will
C
shall
D
need