The teacher asked Ben ____________ a difficult question in class.
#55172
A
answer
B
answering
C
to answer
D
answered
推荐题目
Would you mind ______ here?
#53798
A
not smoking
B
no smoking
C
no smoke
D
not smoke
 We _____ in this pool when we were young, but now it _____ fish. 
#59147
A
are used to swim; used to keep
B
are used to swimming; used to keep
C
used to swimming; is used to keep
D
used to swim; is used for keeping
I       afraid of the dark, but now I don’t.
#63039
A
use to
B
used to
C
use to be
D
used to be