27.be in the dark 蒙在鼓里
A：Do you have any idea what his notice is about?
B：I'm as in the dark as you are.
28、be stuck 卡住了
I can't get this window open.It's stuck.
29.bite off more than one can chew 贪多嚼不烂
A：I hear you're taking an advanced physics course this semester.
B：I think I've bitten off more than I can chew.
30.break new ground 有了新的突破
His architecturaldesign broke new ground in the field.
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.
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