30．I wrote emails to my sister and brother last week. To my disappointment,_______of them wrote me back.
| A．either | B．none | C．neither | D．Nobody |
— Shall I take a message for you?
— _____.
| A．You are welcome | B．With pleasure |
| C．Thanks for your message | D．It’s nice of you |
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. |