School students ________ smoke because it is against the school rules.
Chongqing ______ a lot in the past few years. A.has changed B. changed C. is changing
Mr. Smith didn’t tell us ______. A. where he livesB. where he livedC. where did he live
—How many people did you see in the meeting room? — ______. A. Nothing B. No one C. None
— Your bike is very beautiful. How long ____you _____it? — Just two weeks. A. have; bought B. did; buyC. have; had
—Look! What a nice classroom! — Yes, it ________ every day. A. is cleaningB. has cleaned C. is cleaned