A clean environment can help the city bid for the Olympics, which ________ will promote its economic development．
| A．in nature | B．in return | C．in turn | D．in fact |
_____ is known to us all is that America is a developed country _____ the First World.
| A．Which; belonged to | B．As; belonged to |
| C．What; belonging to | D．It, belonging to |
The mountain-climbing ___ every one of us.
| A．has been tried | B．has tired | C．is tired | D．tired |
I do think my house wants ____.
| A．to be painted | B．to paint | C．to be painting | D．to have painted |
The school required ____.
| A．rebuilding | B．to be re uilt | C．to have rebuilt | D．rebuilt |
You don’t need ____ so early.
| A．leave | B．left | C．to leave | D．leaving |