--More and more people think __ necessary to let the students teach themselves.
-- That's true. They can improve themselves in this way.
A. it has B. it C. that
The more __ people drive, the__ traffic accidents there will be.
A. careful; less B. carefully; fewer C. careful; fewer
-So hot in the classroom. Would you mind __ the windows?
--OK. I'll do it right now.
A. to close B. to open C. opening
Dashan Chinese since he came to China. He speaks good Chinese now.
A. learned B. has learned C. learns
China__ send people into space before, but now we can..
A. can't B. couldn't C. may not
--Shigu Park is beautiful! --Yeah, there __ many visitors every year.
A. is B. are C. has
