The scientist said videophone could be used ___ the conferences.
| A．into | B．at | C．for | D．to |
__________you were coming today, I’d have met you at the railway station.
| A．Have I known | B．Had I known | C．I have known | D．I had known |
Who would you like to have __________the letter?
| A．to post | B．post | C．posted | D．posting |
--------You seem to show interest in cooking.
-------------_________? On the contrary, I’m tired of it.
| A．Really | B．Pardon | C．OK | D．What |
He convinced me __________the difficulty of the work.
| A．on | B．at | C． for | D．of |
East of the lake__________, one of which is twice the size of the other.
| A．lies two villages | B．lie two villages | C．do two villages lie | D．two villages lie |