--- Whose comic book is it?  --- It ________ be Daniel’s. He often shares his comic books with his friends.
#76310
A
must
B
can’t
C
mustn’t
D
can
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As it turned out to be a problem of no importance , we     so much time looking into it . 
#62607
A
needn’t spend
B
didn’t have to spend
C
needn’t have spent
D
oughtn’t to spend
—May I take photos in the museum? —No, you        . You       obey the rules here.
#74471
A
may not; can
B
mustn’t; may
C
can’t; can
D
mustn’t; must
For those of you who ________ a few very popular articles that came out last week, check out this mail.
#62329
A
may miss
B
must have missed
C
may have missed
D
would have missed