559. They employed him as a consultant． 他们雇用他为顾问。

558. There is a chair below the window． 窗户下面有一把椅子。

557. The girl in red is his girlfriend． 穿红衣服的那个女孩是他的女朋友。

556. She spent a lot of money on books． 她花了很多钱来买书。

555. She is poor but quite respectable． 她虽穷，人品却很端正。

554. Once you begin，you must continue． 一旦开始，你就得继续。

553. Money is no more than our servant． 金钱不过是我们的仆人。

552. Its origin is still a mystery now． 它的起源至今仍是个谜。

551. I'd like to look at some sweaters． 我想看看毛衣。

550. I would rather stay at home alone． 我宁愿独自呆在家。