1、Language pointsUnit 4religion n.globe n.violent adj.explode v.presence n.harmful adj.exist v.religious adj.global adj.violence n.explosion n.explosive adj.present adj.harm n./v.existence n.1.It exploded loudly with fire and rock,which were in time to produce the water vapour2)2)not late 及时；不迟in time
2、in time:1)sooner or later;eventually 迟早；最后；终于all the time at a timeat one timeat timesin no timefor the first time一直;始终一次，同时曾经，一度有时候立即，立刻第一次cool v.Please open the window to cool the room down.2.As the earth cooled down,water began to appear on its surface.随着地球的冷却,地球的表面就开始出现了水。cool downa.凉快起来，冷却b.指人的
3、心境“平静下来，使平静下来”A heated argument can be settled better if both sides cool down first.我尽力使她冷静，但是当她离开的时候仍然很生气。I tried to cool her down but she was still very angry when she left.3.Water had also appeared on other planets like Mars but,unlike the earth,it had disappeared later.unlike prep.不同，不像dislike v
4、.不喜欢likely adj.有可能的Mary和她的姐妹不同，她不喜欢跳舞。因此她很可能会拒绝这次邀请。Unlike her sisters,Mary dislikes dancing.So its likely that she would refuse the invitation.be harmful to 对有害do harm to sb.=do sb.harm 伤害某人，对某人有害处1)Pollution is especially harmful to animals.2)吸烟对你有很大的危害。Smoking does you a lot of harm.4.harmful5.Th
5、ey multiplied and filled the first oceans and seas with oxygen.multiply(数目上)增加，增多；乘；（使）繁殖1)Our problems have multiplied since last year.2)2 and 5 multiply to make 10.3)2 multiplied by 5 is 10.6.This encouraged the development of early shellfish and all sorts of fish.encourage 鼓舞；促进；怂恿。encourage sb.t
6、o do sth.High prices for corn and wheat will encourage farming.玉米和小麦的高价将促进农业的发展。My success encouraged me to continue.我的成功鼓励我继续干下去。He encouraged me to learn dancing.他鼓励我去学跳舞。动词过去式过去分词现在分词意义lie躺，位于lie撒谎lay搁，放，下蛋The naughty boy _ to me that the hen that _ there just now had_ two eggs the day before.A.l
7、aid;laid;laid B.laid;lay;lainC.lied;laid;lain D.lied;lay;laidDlaylainlyingliedliedlyinglaidlaidlaying7.They produce young generally by laying eggs.8.It allowed the earth do dissolve harmful gases.allow vt.允许、许可、容许allow+n./pron./doing allow sb.to dobe allowed to doMy father doesnt allow smoking at ho
8、me.In fact he doesnt allow us to smokeanywhere at any time.Are we allowed to use the computer?9.spread的用法（1）vi.（消息等）传开，流传。如：The news spread through the school very quickly.The fire spread from the factory to the house nearby.（2）vt.“使伸展，延伸，张开”，常与out连用。He spread out his arms to welcome us.I spread a n
9、ew cloth on the table.我在餐桌上铺上一条新桌布。他张开手臂欢迎我们。10.in ones turn 轮到某人，接着in turn 轮流地，依次地take turns to do sth.轮流做某事Its ones turn to do sth.轮到某人做某事11.They are putting too much carbon dioxide into the atmosphere,which prevents heat from escaping from the earth into space.阻止某人做某事:prevent sb.(from)doing sth.s
10、top sb.(from)doing sth.keep sb.from doing sth.You should prevent the child from injuring himself.1.This is the best way I can think of _ into dangerous areas.A.to prevent people getting B.preventing people getting C.stopped people gettingA12.Escape v.escape sthdoing sthescape punishment=escape being
11、 punishedescape from some placeEscaping from the prison is difficult.13.depend on/upon 1)信赖，依靠depend on/upon sb to do sthYou mustnt depend on others to help you.2)视而定，取决于The price depend on the quality.Your success depends on whether you work hard.That depends on how you did it.That /It(all)depends.
12、那得看情况而定 He may support me,but it depends.Useful sentences 1.What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.它将会变成什么没有人知道，直到38-45亿年前这团尘埃开始慢慢地合成一个固体的球状物。2.The earth became so violent that it was not clear whether the shape would
13、last or not.地球（开始）变得激烈动荡，不知道这个固体形状是否会继续存在下去。3.What is even more important is that as the earth cooled down,water began to appear on its surface.更为重要的是，随着地球的冷却,地球的表面就开始出现了水。4.What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids int
14、o the oceans and seas.5.It was not immediately obvious that water was to be fundamental to the development of life.7.Why they suddenly disappeared still remains a mystery.6.This produced a chain reaction,which made it possible for life to begin to develop.8.So whether life will continue on the earth for millions of years to comewill depend on whether this problem can be solved.在未来的千百万年中，生命能否在地球上延续将取决于这个问题能否得到解决。
