1、Unit 1 Treeschemicalcommunicatehardly (any)naturalrunsupposepollute v. pollution n.science n. scientist erest n. interested adj. interesting adj.noise n.noisy adj.wood n.wooden adj.live v. living adj. alive adj. life n.health n. healthy adj.unhealthy adj.nature n.natural adj.danger n. dangerous

2、 adj.be interested inliving thingsmake streets more beautiful and less noisykeep your whole class alive and healthycome fromenjoy doing sth.of course = certainlyone and a half hectaresknow a lot aboutcommunicate within danger / safetycut downwarn sb. (not) to do sth.They are the biggest and oldest l

3、iving things on the Earth.The trees can then protect themselves by producing a chemical that makes their leaves taste nasty.How many people are there in your class? cf. How muchcf. almost, hardlyanother, (the) other(s)five million, millions ofenough oxygen, fast enoughas well, as well asfor example,

4、 such asjoin, take part inGrammar: the present continuous tensecf. the present simple tenseSpeak up: ways to fight pollutionWriting: A newspaper article on Unit 2 Waterfreeze pump relax until viewloud adj.loudly fortable adj. comfortably adv.cloud n.cloudy adj.turn off / onsound impatient / puzzledt

5、he Yangtze River / Huangpu Riveraddtoremember (not) to do sth.the journey of It s not easy for me to get here.Do you know where I am from?It was time to get cleaned up.I waited there until you called me.What do you mean by liquid gold?Why did Daisy look around? Because she heard a voice.cf. voice, s

6、oundcarry, take, bringlike, astalk, speak, tell, sayGrammar: talking about amountsa lot of / a little / not much / no + u.n.a lot of / many / a few / not many / no + pl.n.the right amount: enough + n.more than the right amount: too many / too muchless than the right amount: too few / too little / no

7、t enoughSpeak up: the use of waterWriting: Making / Writing about flow chartsUnit 3 Electricityat last connect electricity energy form monthlytrickfool v. & n.foolish adj.change v. & n. changeable adj.careful adj.carefully adv.polite adj.politely adv.month n.monthly adj. & adv.safety n.safe adj.one

8、eveninga packet of sweets / electricitylaugh atplay a trick on sb.at last = in the end = finallylook foolishlook likedifferent forms of energyflow through a wire / come into one s flat through thin wiresalthough electricity is much more dangerous than water.Electricity is a good servant, but a dangerous one.Nobody s ever seen electricity.It s invisible.We call the thick wires cables.May I have my packet of electricity, please? Yes, you may.cf. think of, think about,