1. 彼得一直没有来的原因是他没赶上这班火车。(catch) 2. 他认为每次考试作好准备是重要的。(it) 3. 学好一门外语需要时间和努力。(effort) 4. 如何解决这道难题将在明天的会上讨论。(solve) 5. 对学生来说，把座位让给这位老年妇女是最礼貌的。(polite) 6. 与汤姆打赌是没有用的，因为他永远不会改变他的想法。(no use) 7. 我宁可失去这场比赛，也不愿意伤害他。(would rather) 8. 除了请医生外，似乎没有别的事可做。(nothing but) 9. 据说这本书已被译成好几种外语。(translate) 10. 爱伦今天上午缺席，因为她要去补牙。(have sth. done) 11. 我不能让你整天上上下下地跑着。(have sb doing) 12. 噪音那么多，以至于演讲者无法使自己被听众听清楚。(so… that) 13. 作为奥林匹克运动会的主办国是不容易的。(easy 14. 成年人有时太忙，不能玩耍。(too… to) 15. 老师们认为英语语法不难学。(think) 16. 他给了我很大的帮助，真是不胜感激。(It’s …of sb) 17. 不懂装懂的人总有一天会受到惩罚。(pretend) 18. 说实话，直到昨天我才知道他们去上海了。(not… until) 19. 只有通过实践，才能提高你的口语水平。(only) 20. 再也没有比看到学生的进步更使老师们高兴的了。(nothing… than) 参考答案： 1. The reason why Peter hasn’t come is that he didn’t catch the train. 2. He thinks it important that he does full preparation before the examinations every time. 3. Learning a foreign language well requires time and effort. 4. How to solve the problem will be discussed at tomorrow’s meeting. 5. It is polite for the student to give up his seat to the elderly woman. 6. It is no use debating with Tom, because he will never change his mind. 7. I’d rather lose the game than hurt him. 8. There seemed nothing else to do but send for a doctor. 9. It is said that the book has been translated into several foreign languages. 10. Ellen was absent this morning because she had her tooth filled. 11. I can’t have you running up and down all day long. 12. There was so much noise that the speaker couldn’t make himself heard. 13. It is not easy to be a host nation for the Olympics. 14. Adults are sometimes too busy to play. 15. The teachers don’t think it is difficult to learn English grammar. 16. It is very kind of him to give me so much help. 17. Those who pretend to know what they do not know will be punished one day. 18. To tell the truth, I didn’t know that they had already gone to Shanghai until yesterday. 19. Only by practice will you be able to improve your spoken English. 20. Nothing can give teachers more pleasure than to see the students’ progress.