I think ______ is necessary ______ us to do something useful to protect the birds.
A. this; for B. it; of C. this; of D.it;for
Dick ___________in America, but now he has been_______Chinese food since he moved to Wuxi.
A.used to live; used to eating
B.is used to live; used to eat
C.is used to living; used to eating
D.used to living; used to eat
The words that we should pay attention to ___________ on the blackboard.
A. being written B. are written C. is writing D. writing
My father always has fun __________with the neighbours on weekends.
A. to play chess B. playing chess
C. playing the chess D. to play the chess
I need your help because I don't know __________.
A. how to do B. what to do it C. what should I do D. how to do it
This is a meaningful article. It is well worth __________again.
A. seeing B. reading C. watching D. to read
