1、Unit 1 Treeschemical communicate hardly (any) natural run supposepollute 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.

2、 dangerous adj.be interested in living things make 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

3、and oldest living 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 much? cf. almost, hardlyanother, (the) other(s) five million, millions of enough oxygen, fast enough as well, as we

4、ll as for example, such as join, take part inGrammar: the present continuous tense cf. the present simple tenseSpeak up: ways to fight pollutionWriting: A newspaper article onUnit 2 Waterfreeze pump relax until view loud adj. loudly fortable adj. comfortably adv.cloud n. cloudy adj. turn off

5、/ onsound impatient / puzzled the Yangtze River / Huangpu Riveraddtoremember (not) to do sth.the journey ofIts 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 s

6、he heard a voice.cf. voice, sound carry, take, bring like, as talk, speak, tell, say Grammar: 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

7、 amount: too few / too little / not enoughSpeak up: the use of waterWriting: Making / Writing about flow chartsUnit 3 Electricity at last connect electricity energy form monthly trickfool v. & n. foolish adj.change v. & n. changeable adj.careful adj. carefully adv.polite adj. politely adv.month n. m

8、onthly adj. & adv. safety n. safe adj.one 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 ones flat through thin wiresalthough electricity is much more dangerous than water.Electricity is a good servant, but a dangerous one.Nobodys ever seen electricity.Its invisible. We call the thick wires cables.May I have my packet of electricity, please? Yes, you may.cf. think of, think about, think over