I bought an ancient Chinese vase, _______ was very reasonable．
| A．which price | B．the price of which | C．its price | D．the price of whose |
We were about to go out for a walk ______ it began to rain.
| A．while | B．before | C．as | D．when |
Sam _____ some knowledge of the computer just by watching others working on it.
| A．brought up | B．looked up | C．picked up | D．set up |
Children who are not active or diet is rich in fat will gain weight quickly.
| A．what | B．whose | C．which | D．that |
--- What are you going to do tomorrow ?
----How about going to buy Michael Jackson CDs?
----- ______________
| A．Take your time . | B．Not at all |
| C．Sounds great | D．It doesn’t matter. |
The old man would appreciate _____ if you could do him that favour.
| A．one | B．it | C．that | D．this |