--- What        it be? --- It         be a man, for it is not moving. It      be a dustbin, I think.
#87983
A
can, may, must
B
can, can’t, must
C
can, must, can
D
may, may not, could
推荐题目
All our teachers demand that we ___________.
#87507
A
worked hard
B
work hard
C
will work out
D
should be worked hard
— Why didn’t you give a hand to the boy?— I _______, but he strggled to his feet before I tried to.
#89488
A
would like to have
B
would like to
C
would rather to have
D
would better
— Why! I _____ get you on the phone. — We ______ basketball on the playground when you phoned. 
#89278
A
didn't; must be playing
B
couldn't; must be playing
C
couldn't; must have played
D
didn't; must have been playing