11、 allergic to 对|……过敏
　　Oh man! Something in this room is making my eyes itch. I must be allergicto something.
　　12、 at sb’s service 愿为某人服务
　　I am at your service at any time.
　　13、 around the clock 24小时不停
　　Martha studied around the clock for management exam.
　　14、 as far as I know 就我所知
　　15、at home with 对…..很熟悉
　　She is at home with problems like this.
　　16、 back out
　　1) 退出
　　A: Wasn’t Bert supposed to sing tonight?
　　B: Yes、 but he backed out at last minute
　　2）不履行
　　She finally backed out of her promise.
　　17、 be cut out for 天生适合
　　I’m not cut out to be a hero.
　　18、 be absorbed in
　　She has been absorbed in a horrorfiction. I can’t tear her away.
　　19、 be addicted to 对……上瘾
　　She has been addicted to drugs for years.
　　20、be attached to 对……有感情
　　A: I’m amazed that you are still driving that old car of yours. I thought you would have gotten rid of it years ago.
　　B: It runs well and I’ve actually been quite attached to it.   

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