--Who has opened the door?  ---I think it __ be Lin Tao. He’s always the first to get here.
#88947
A
is able to
B
can't
C
must
D
mustn’t
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You didn’t let me drive. If we ______ in turn, you ______ so tired.
#87358
A
drove…didn’t get
B
had driven…wouldn’t have got
C
drove…wouldn’t get
D
were driving…wouldn’t get
----She didn’t take the medicine last night, did she?­   -----              .
#87123
A
No, but I wish she wouldn’t
B
No, but I wish she had
C
Yes, but I wish she did
D
Yes, but I wish she would
You must be a writer, _____?
#90135
A
mustn’t you
B
are you
C
must you
D
aren’t you
-Why didn’t Susan come to see us yesterday as she promised?-______. 
#87312
A
She must be busy
B
She might have been free
C
She must have been busy
D
She can’t be free