He ______ in this factory for 20 years already.
A. worksB. will work C. has worked D. is working
Today， computers are really helpful. They ______ everywhere.
A. use B. are used C. usedD. were used
— Can you ride a horse?
—No， I ______.
A. can’t B. may not C. needn’t D. mustn’t
— What’s your father doing now?
— He ______the room．
A. cleaned B. cleansC. is cleaningD. has cleaned
Tian’anmen Square is one of______ squares in the world.
A. large B. largerC. largestD. the largest
It’s a nice house______it hasn’t got a garden.
A. and B. or C. but D. so
