What can we students do _____ the environment?
A.to protect B.protected
C.protecting D.protects
—How long have you lived in this town?
—_____ 2001.
A.Since B.In C.To D.Until
There are five people in the room, but I know _____.
A.both of them B.none of them
C.all of them D.neither of them
Don’t give up _____ you will never succeed.
A.and B.but C.while D.or
Trees can stop the sand _____ towards the rich farmland in the south.
A.moved B.to move
C.from moving D.moves
—Can’t you stop making so much noise? I really can’t _____ it.
—I’m terribly sorry for giving you so much trouble.
A.keep B.stand C.hear D.make
