—Do you know whose dictionary it is?—It ________ be Ann’s. Look! Her name is on the first page.
#74986
A
must
B
could
C
might
D
can
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Food safety is important. Rules        to stop people from food pollution.
#76536
A
must make
B
must be made
C
can’t make
D
can’t be made
My sister met him at the Grand Theater yesterday afternoon, so he ________ your lecture.
#63289
A
couldn’t have attended
B
needn’t have attended
C
mustn’t have attended
D
shouldn’t have attended