Trees can stop the wind ______the earth away.
A. from blowingB. to blow C. blew
Kelly’s main job is _____ the message about protecting the environment.
A. helping spreadB. to help spreading C. to help spread
They are making too much noise here. Let’s go _______.
A. somewhere quietB. everywhere noisyC. anywhere noisy
His grandma ________ ______ two years.
A. died; since B. has been dead; for C. has died; for
Chongqing ______ a lot in the past few years.
A．has changed B. changed C. is changing