—I think everyone must do his best to _______pollution.—If so, there will be a good future for people of tomorrow.A. keep B. stop C. stand
The twin brothers have different interests. Jim likes music, ______Jack likes sports .
Parents ________ good conditions ________ us. We should thank them.
Suzy_______ to school in the past, but now she takes a bus.
which of the following is NOT a natural disaster?
“We give him a book.” The structure (结构) of sentence is .