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
But as far as I know， he once won the world champion at the Olympic Games.
15. at home with 对……很熟悉
She is at home with problems like this.
16. back out
退出
A：Wasn' t Bert supposed to sing tonight?
B：Yes， but he backed out at last minute.
不履行
She finally backed out of her promise.
17. be cut out for 适合于，有做某事物的天赋
She is cut out for a dancer.
18. be absorbed in 全神贯注于某事物
She has been absorbed in a horrorfiction. I can' t tear her away.
19. be addicted to 对某事物上瘾
She has been addicted to drugs for years.
20. be attached to 对某事物有感情
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.
以上就是对于雅思听力词组的一些总结，当然这并不全面，只作为抛砖引玉之用，希望对大家有所帮助，最后祝大家都能考出好成绩。