---Someone is knocking at the door. Who may it be? ---It ______ be Tom. He is still in the school.
#74601
A
can’t
B
mustn’t
C
couldn’t
D
may not
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—We need a person badly to be in charge of this design.—________ the new comer have a try?
#62868
A
May
B
Will
C
Shall
D
Need
I told Sally how to get here, but perhaps I ______for her.
#62233
A
had to write it out
B
must have written it out
C
should have written it out
D
ought to write it out
Mr Black be at home because she called me from England just now.
#76189
A
mustn't
B
isn't able to
C
can't
D
may not