Lucy spent three years _______ Chinese before she came to China.
A. on learning B. to learn
C. learning D. learn
Tina used to __________a round face.
A. is B. have
C. be D. has
It was difficult for the rich _____ a happy life.
A. to have B. having C.had D.have
We’ve walked for a long time.Let’s stop ____a good rest
A. having B.had C.to have D.have
A Wechat (微信) is an invention __________ can help people talk to friends, share photo, ideas and feelings freely.
A. which B. who C. whose D. /
_____ of the water _____ polluted. We must try to protect our environment.
A. Two third; are B. Two third; is
C. Two thirds; are D. Two thirds; is
