Our classroom must __________ every afternoon.
A. clean B. cleans C. cleaned D. be cleaned
We should leave early tomorrow morning， _____ we won’t get there on time.
A. and B. so C. or D. but
In order to keep healthy， Tony ________ a walk after dinner every day.
A. takes B. taking C. took D. was taking
The students ______ a school trip next Friday.
A. take B. will take C. took D. have taken
David and Tom are good friends. They ______ each other for ten years.
A. knew B. know C. have known D. had known
—__________ were the boys?
—Oh， they played basketball on the playground.
A. When B. What C. Who D. Where
