In order to make our city green, _________.
| A．it is necessary to have planted many trees | B．many more trees need to plant |
| C．we must plant more trees | D．our city needs more trees |
They____on the program for almost one month before l was arranged to help them. Now, we____on it as no result has come out.
| A．had been working: are still working |
| B．had worked; were still working |
| C．have been working; have worked |
| D．have worked; are still working |
Meeting my uncle after all these year was an unforgettable moment ,_______I will always remember.
| A．that | B．one | C．it | D．what |
---Keep a____eye on your little girl!
-Oh, my God! She is standing too ____to the fire.
| A．closely, closely | B．close, closely | C．close，close | D．closely , close |
Do you believe __ true ___ you find high wages, you generally find high prices?
| A．that; that | B．that; that what |
| C．it; when | D．it; that where |
The government has been under growing pressure to ______ the causes of air pollution as smog frequently smothers the country's large cities．
| A．release | B．schedule |
| C．address | D．maintain |