It has been announced that all the students ______ put on the masks before going to school in case they are infected with SARS virus.
#88152
A
shall
B
will
C
need
D
may
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—Shall I tell John about it？ —No, you _____ ,I've told him already.
#89168
A
needn't
B
won't
C
mustn't
D
shouldn't
His brother met him at the Great Theatre yesterday afternoon, so he ____ have attended your lecture.
#87186
A
couldn’t
B
needn’t
C
mustn’t
D
shouldn’t
—What do you think of Sam, the newcomer? —Well, he talks as if he ________ everything.
#87204
A
had known
B
has known
C
knew
D
will know
Our monitor requested that ________.
#87441
A
all the class studied more carefully the problem
B
the problem was more carefully studied
C
with great care the problem could be studied
D
all the class study the problem more carefully