11， allergic to 对|……过敏Oh man！ Something in this room is making my eyes itch. I must be allergic to 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 horror fiction. 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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