China _______________a high-speed railway network covering almost all its cities with a population of of more than 500，000 by 2015．
| A．is setting up | B．will set up |
| C．has set up | D．will have set up |
Finally they agreed ____ the terms of the contract.
| A．on | B．to | C．with | D．at |
Do you agree____ this plan (arrangement)?
| A．at | B．with | C．on | D．to |
I agree ____ what you said.
| A．to | B．on | C．with | D．at |
He wrote the article ____ three days.
| A．at | B．in | C．on | D．by |
He will return____ three o'clock.
| A．after | B．in | C．on | D．at |