---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the teachers’ office just now.
#76689
A
mustn’t
B
can’t
C
couldn’t
D
must
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—I think the man over there must be Bob. -- It_______ be him. He has______ to Australia.
#78073
A
can’t, gone
B
can’t, been
C
may not, been
D
mustn’t, gone
—Tom can’t find his gloves. Are these blue gloves his? —No, they ______ be his. His gloves are black.
#74943
A
must
B
may
C
can’t
D
mustn't
—Catherine, I have cleaned the room for you.—Thanks. You_______ it. I could manage it myself.
#62965
A
needn’t do
B
needn’t have done
C
mustn’t do
D
shouldn’t have done