----Do you know the little boy _______is helping the old man cross the road?
----No. But how nice he is!
A. which B. who C.whom D. \
The man________be my English teacher. He has gone to Canada.
A.might B.must C.can’t D.should
Thanks to the Internet, different kinds of information _________ in a short time.
A.can be learned B. has been learned
C. can learn D.has learned
By the time I got to the theater, the show ___________for about twenty minutes.
A.had begun B.has started
C.had been on D.has been on
The girl is often seen _______in the music room. She sings very well.
A. practice sing
B. to practice singing
C.practiced singing
--Do you believe that paper is made _______wood?
--Yes, I do. And you can see that books are made ________paper.
A.from, from B.from, of C. of, from D. of, of
