585. The book is protected by copyright． 该书受版权保护。

584. Suppose it rains,what shall we do? 万一下雨，我们该怎么办?

583. She became more and more beautiful． 她变得越来越漂亮了。

582. Linda speaks as if she were a boss． 琳达说话总好象她是老板。

581. Let"s take a short break for lunch． 让我们休息一会儿，去吃午饭。

580. Bob has always had a crush on Lucy． 鲍伯一直在爱着露茜。

579. It"s rude to stare at other people. 盯着别人看是不礼貌的。

578. It"s nothing to be surprised about． 这事不值得大惊小怪。

577. I"d like to-repair our differences． 我愿意消除一下我们之间的分歧。

576. I hope you enjoy your stay with us． 希望您在这儿过的愉快。