The people there are surfing the Internet, ______?
A. aren’t there B. are ther
C. are they D. aren’t they
________ of the students in our class is 64, and ________ of them are girls.
A. The number ; one third B. A number; one third
C. The number; two third D. A number; one second
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
