30.luck 名，运气 good luck

　　lucky 形，幸运的a lucky number

　　luckily 副，幸运的是 Luckily, we got better marks.

　　unlucky/unluckily

　　31. noise名，噪音 Don’t make any noise.

　　noisy 形，吵闹的 much too noisy

　　noisily 副，吵闹地 talk noisily

　　32. noise 噪音

　　sound 声音We sat listening to the sound of the waves

　　听起来 The music sounds beautiful.

　　voice 嗓音 The singer has a sweet voice.

　　33. provide 提供

　　provide a chance for the boy=provide the boy with a chance

　　offer :offer a chance to the boy=offer the boy a chance

　　34. other别的 ，加名词 other students

　　another另一个 I don’t like the pair of shoes, would you like to show me another pair?

　　the other 两个中的另一个,常用one…the other Here is a shoe, where’s the other one?

　　others= other+名词

　　35. over/ under 年龄的上下

　　above/ below温度，楼层的上下

　　36. peace名词，和平 love peace

　　peaceful形，宁静的 a peaceful village

　　peacefully 副，和平地

　　we hope to solve the problem peacefully.

　　37. pleasure名，乐意。对方请求帮助—With pleasure. 帮助后对方感谢—My pleasure./ It’s my pleasure.

　　pleasant 形， 修饰物 a pleasant trip

　　pleased形，修饰人 I am pleased with the robot.

　　38. pollute动，污染 The water will be polluted if you do that.

　　polluted形，被污染的 Our planet is becoming more and more polluted and crowded.

　　pollution 名，污染 noise pollution

　　39. quiet 安静的 keep quiet

　　quite相当 quite quiet

　　40. receive收到

　　accept 接受

　　I received a valuable gift but I didn’t accept it because of its value.