V ocabulary1.live v. 生活adj. living 有生命的living thingsadj.alive 活着的keep your whole class /us alive2.fight v. 战斗n..fighter 斗士；战士pollution fighters3.nature n.. 自然adj.natural 自然的natural air conditioners4.produce v. 生产n..product 产品produce a chemical paper products5.science n..科学n..scientist 科学家interview a scientist6.interest n..兴趣adj. interested 感兴趣的be interested inadj.Interesting 有趣的an interesting story7.breath n. 呼吸v.breathe 呼吸breathe pure, cool air8.chemistry n. 化学n..chemical 化学品produce a chemicaladj.chemical 化学的chemical symbolsmunicate v. 交流communicate with each othern. communication 交流focus on communication10.place v. 安放v.replace 取代replace hardly any of the trees11.protect v. 保护n.protection 保护protect themselves by producing a chemical…need some protection12.pollute v. 污染pollute the air n..pollution 污染air pollution13.health n. 健康adj. healthy 健康的adj.unhealthy 不健康的词性转换health problems keep your whole class healthy unhealthy food14.noise n. 噪音adj.noisy 吵闹的make our streets less noisyadv.noisily 吵闹地talk noisily15.wood n. 木头adj.wooden 木制的a wooden chair16.harm n. 危害；v. 伤害adj. harmful 有害的adj. harmless 无害的take harmful gases from the air harmless animals17.taste v. 尝adj.tasty 美味的taste nasty tasty food18.danger n. 危险be in danger adj.dangerous 危险的It's dangerous to do …19.thank v. 感谢thank sb. for …adj.thankful adj. 感激的be thankful to …20.real adj.真的v. realize认识到,实现realize the importance of…adv.really真正地really sorry21.begin v. 开始begin to do …n.beginning 开始at the beginning of …Complete the sentences with the given words in their proper forms:1. Trees can make the streets more beautiful and less __________. (noise)noisy2.As we all know, there are no _________ things on the moon. (live)living3. Water and oxygen are very important. They can keep us ________. (live)alive4.Trees are our best __________ against pollution. (fight)fighters5.Trees are _________ air conditioners. They can cool the air as well as clean it. (nature)natural6.Now many ____________ are starting to study trees. (science)6/ 1scientists7.Doctor Ray is ___________ in trees. She helps Judy to collect some facts for an___________ project on pollution. (interest)interestedinteresting8.Trees __________ a chemical to protect themselves from the insects. (product)produce9.Everyone must help to fight against __________ to make our earth clean. (pollute) pollution10.We can _________ fresh oxygen with the help of trees. (breath)breathe11.People cut down and burn millions of trees, but they _________ hardly any of them. (place) replace12.The factory releases _________ gases into the air and pollutes the environment seriously. (harm)harmful13.The trees can protect themselves by producing a nasty __________. (chemistry) chemical14.It's not good of you to write or draw something on the __________ desks. (wood) wooden15.I'm ________ sorry for not knowing a lot about trees. (real)really16.Trees can _____________ with each other underground. (communication) communicateMatch the following: use something else instead1. suppose connect things together2. release work3. run say something bad or dangerous happen4. communicate let out5. warn think it is true or possible6. join exchange information with7. burn damage something by fire8. replaceSpell The words:1._________ a thing that is true2._________ something (i.e., a solid, liquid or gas) used in chemistry3._________ metric measure of area (10,000sq m)4. _________ a gas present in air and essential for life5. _________ made by nature, not by man6. _________ clean7. _________ unpleasant, not nice1.Everyone likes to breathe pure air. The underlined part means ________.A. cleanB. hotC. coolD. comfortable6/ 22.There is hardly any rice in the bowl. The underlined part means _______.A. almost noB. nearly notC. noD. not any3.I don't like the butter with the unpleasant smell. The underlined part means _________.A. tastyB. unhappyC. nastyD. uncomfortable4.The air conditioner isn't working properly. The underlined part means ____.A. going quicklyB. drivingC. managingD. runningUseful Phrasesbe interested in = show / have interest in =be keen on2. make something. + adj.make sb. do somethingmake sb. something= make something for sb.3. what else / who else / anything else…4. on the end ofat the end ofby the end ofin the end / at last/ finally5. come from= be from6. enjoy doing somethingenjoy oneself / have a good time7. thank sb. for something / doing something8. take something from someplace9. release…into…10. one and a half hectares= one hectare and a half11.keep sb. +adj.keep doing12. …as well as…/ …and …as well / not only …but also …/ both…and …13. know (a lot) about…a lot of + n.14. begin (start ) to do / doing …15. for example; such as; like16. warn sb. (not) to do17. protect sb. from …stop / keep / prevent sb. from …18. by doing …19. taste nastylook / smell / taste/ sound / feel…+ adj.20. pass…to …21. communicate with sb.22. be in dangerStudents will make great progress if they _______ a subject.A. are interested inB. are interestingC. are interestedD. are interesting in2. The government warned some factories _______ the water again, or they will be punished.6/ 3A. polluteB. to polluteC. not polluteD. not to pollute3. ______, the prince and the princess got married and lived a happy life.A. On the endB. In the endC. By the endD. At the end4. The soup tastes ________ and no one wants to have any more.A. deliciousB. deliciouslyC. nastyD. nastily5. Our earth will be ____ if we go on cutting down millions of trees every year.A. in great dangerB. dangerC. dangerouslyD. out of danger6. The boy thanked his teacher ______ helping him ______ his English。