Not only________polluted but________crowded．
| A．was the city；were the streets |
| B．the city was；were the streets |
| C．was the city；the streets were |
| D．the city was；the streets were |
Don’t throw away the waste paper. It needs so that it can be reused.
| A．to destroy |
| B．destroying |
| C．to collect |
| D．colleting |
Something is wrong with my computer. It needs .
| A．mending |
| B．to mend |
| C．mended |
| D．is mending |
The classroom every day.
| A．should clean |
| B．should be cleaned |
| C．should cleaned |
| D．should be cleaning |
—A talk on American culture in the school hall yesterday afternoon.
—It’s a pity. I missed it.
| A．gave |
| B．was given |
| C．has given |
| D．is given |
Teenagers _______ allowed to drive in the street．
| A．should not be |
| B．should be not |
| C．not should be |
| D．shouldn’t |