A. since B. after C. during D. when

— Next year.

A. when did he come back B. when he came back

C. when will he come back D. when he will come back

— Well, more trees ________ every year to stop the wind.

A. must be planted B. can plant

C. should planted D. must been planted

—He ________ to Dalian for an important meeting.

A. goes B. went C. has been D. has gone

A. not to play B. not play C. to not play D. not playing

A. much carful B. more careful

C. much carefully D. much more carefully

— No, Lucy is at home ________ she has got a high fever.

A. because B. if C. until D. unless

— Thank you. I will look left and right before I ________ the road.

A. cross; cross B. across; across C. cross; across D. across; cross

A. in, in B. in; on C. at; in D. at; on