-The cars give off a great deal of waste gas in the street.
-Yes, but I'm sure something will be done to __________ air pollution.
| A．reduce | B．remove |
| C．collect | D．warn |
.Mary felt ______from the outside world, since she lacked an Internet connection and couldn’t receive any e-mail.
| A．cut down | B．cut in | C．cut off | D．cut out |
I have been looking for Michael for a whole day. Where ______ he have gone?
| A．should | B．can | C．must | D．may |
.—You couldn’t have bought me any present better. —_______.
| A．I’m glad you like it. | B．Then I’ll give you a better one next time. |
| C．You have a gift for present | D．I’m sorry I can’t make you satisfied |
So suddenly _____ that I hadn’t prepared for it. What a pity I had let it go!
| A．the chance came | B．the chance would come |
| C．did the chance come | D．would the chance come |
Our new school was built in a beautiful place, around _____ high mountains.
| A．which was | B．it was | C．which were | D．them were |