----Have you ever ______Lintong to see the Terra Cotta Warriors?
----Yes, I have.

The film ______for ten minutes.

----Where is Sandy?
----He ______to anwer the phone. He’ll be back in a minute.

Jenny is a nurse and ______in Town Hospital.

---It’s more and more important to protect our earth.
----I think so. If everyone ______a contribution to it, our world will be more beautifu..

I must return the camera to Cindy. I ______it for two weeks.

The children planted more trees and flowers after they______Greener China.

Every means ______ prevent the water from ______.

He is talking so much about America as if he ______ there.
A. had been              B. has been              was                        D. were

Tens of thousands of trees _____ in the area in the past few years.