31、benefit concert 慈善音乐会
　　
We need to let everyone know about the benefit concert、 but we don’t have much money for advertising.
　　
32、 busy signal 占线
　　
I’ve been calling David for the past half hour, but I keep getting a busysignal.
　　
33、between you and me 你我之间、保密
　　
34、call for
　　
A、打电话找
　　
Tom just called for you.
　　
B、预报
　　
The forecast calls for heavy rain again tonight. Aren’t you glad we’ll be getting away from this for a week?
　　
C、问
　　
It’s probably in the new part of town. We’ll have to call for directions.
　　
35、 call it a day 就此结束
　　
A: I’m really glad our club decides to raise money for the children’s hospital, and most of the people we’ve phoned seemed happy to contribute.
　　
B: Yeah、 I agree. Now we’ve gone through all the numbers on our list now, so I guess we can call it a day.