新托福听力考试真题高频短语1_第2页

　　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.