The teacher asked Ben ____________ a difficult question in class.
#55172
A
answer
B
answering
C
to answer
D
answered
推荐题目
---Your new blouse looks very beautiful. Is it _____silk?---Yes. It’s _______ Hangzhou.
#54954
A
made of, made in
B
made from, made into
C
made in, made in
D
made for, made by
He can’t__________ in the library.
#59392
A
shouts
B
to shout
C
shouting
D
shout
You should try your best ____ your English. 
#57127
A
to improve
B
improving
C
improves
D
improve