I ______ along the road when suddenly someone patted me on the shoulder from behind.
A. walked B. had walked
C.was walking D. would walk
We are told ________ everywhere. It’s our duty to keep our school clean.
A. not to make much noise B. to throw waste paper
C. to draw D. not to spit
---Mind your steps, guy! Don’t you see the words “__________ the grass”?
A. Keep off B. Keep out
C. Take off D. Take out
Nobody can learn English well __________he works hard on it.
A. if B. unless
C. when D. but
I agree with most of what you said ,but I don’t agree with _______.
A. everything B. anything
C. something D. nothing
The ice changed ____ water ____ warm air around .
A. in; into B. into; in
C. to; into D. into; to
