In Xinjiang those farmers who ______ move from place to place with their animals in the past have moved into new houses at last.
| A．could | B．might | C．would | D．should |
E-mail, as well as telephones, ___ an important part in daily communication.
| A．have played | B．is playing | C．are playing | D．play |
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 |
He was about to tell me the secret _______ someone patted him on the shoulder.
| A．as | B．until | C．while | D．when |
We may go to Hawaii or California._______ , we have to find a way to escape the snow this winter.
| A．Also | B．In addition | C．Somehow | D．Anyway |
As time went by, the plan I stuck ______ fairly practical.
| A．to was proved | B．to proving | C．to proved | D．to be proved |