vocabulary
1.______________ n．天文学 ______________ n．天文学家 2.______________ n．学说；理论 _____________ adj.理论上的 3.______________ n．球体；地球仪；地球 ______________adj.全球性的；全世界的 4.______________ adj.猛烈的；激烈的；强暴的
______________ n．暴力 ______________ adv.猛烈地 5.______________ n．大气层；气氛
6.______________ prep.不同；不像 ______________ vt.不喜欢 7. ______________ n.出席；到场；存在
______________adj. & n. & v．在场的；目前，现在；出席；颁发，授予
8. ______________ adj.有害的；伤害的
______________ n．危害，害处 ______________adj.无害的 ___________________________________ phrase.对......是有害的 9. ______________ vi.存在，生存 _____________ n．存在，生存 10．______________ n．谜；难题vt. & vi.(使)迷惑；(使)为难 ______________ adj.迷惑的______________ adj.令人迷惑的 phrase
1．______________________ 及时；终于 2．______________________ 下蛋
3．______________________ 产生；分娩
4．______________________ 轮到某人；接着 5．______________________ 阻止；制止 6．______________________ 挡住(光线)
7．______________________ 感到高兴；感到振奋 8．______________________ 既然
9．______________________ 突发；爆发
10．______________________ 密切注视；当心；提防 warming up
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1.What’s the meaning of the word “Astronomy”? A. the science of stars.
B. the scientific study of stars and planets.
C. the scientific study of the stars, planets, and other objects in the universe.
2. What words will you think of when we talk about this topic? planet /atmosphere / galaxy/ solar system...
Venus Mercury Earth Mars Neptune Saturn Uranus Jupiter
Reading
I. Answer these questions
1.Why the earth was different after the water appeared?
2.Why did plants grow before animals?
3.Why did animals first appear in the sea not on the land?
4.What is the main difference between reptiles and mammals? Can you give some examples of mammals? II. Fill in the forms
After the “Big Ban”, the earth was just a cloud of __________. It ________ loudly with fire and rock, which were________ ________ to produce the water vapour,other gases and so on. As the earth ________ ________, water began to appear on its ________, which was to be _____________ to the ___________ of life.Then small plants grew. They ___________ and filled the oceans and seas
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with oxygen. Many millions of years later, the first green plants began to ________ on land. When the plants grew into forests, ________ appeared for the first time.They produced young generally by ________ eggs.
Dinosaurs’ disappearance made possible the rise of __________ on the earth. Now small clever animals with ________ and ________ appeared and __________ all over the world. As time went by, they are putting too much carbon dioxide into the _______________, which________ heat ________ escaping from the earth into space. Whether life will continue on earth for millions of years to come will ________ ________ whether this problem can be ________.
Language points
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. (line.6) what引导的是________从句，并在从句中充当become的_______（句子成分）。When引导的是_______从句。句中还有not...until...句型，not体现在________中。
直到我看了报纸，才相信他说的是真的。
________________________________________________________更为重要的是，水开始在地球表面出现。
________________________________________________________ 2. ...it was not clear whether the shape would last or not.
翻译 ___________________________________________________ 句中it做___________, whether引导的是_______________.
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飞机上的人是否活着仍然是未知的。
________________________________________________________很明显，水对生命的发展是基础的。
________________________________________________________ 3. They were in time to produce carbon,…
in time _______________________
in time + _________ / _________ 翻译为 __________________ You will succeed in time as long as you don’t give up. Will I be in time for the train?
The doctor came in time to save his life. 与time相关的短语:
on time _______________ in no time _________________ at a time _____________
at one time _________________
for the first time _____________ from time to time ____________ 4. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.
翻译：___________________________________________________ what引导_________从句。并在从句中做believe的__________（句子成分）；that 在句中引导_________从句，不能省略。 5.lay lie lie lay
意思 现在分词 4
过去式 过去分词 The boy who _______ under the tree _______ to me that the cock ________ an egg yesterday. 6.exist vi. 存在；生存；维持生活
(1)There always ________ a force of attraction between two bodies. (2)They __________ _________ very little food. (3)When did the world come into ___________？
Using language
1. It will not be as strong a pull as the earth’s. 翻译：___________________________________________________ 练习
（1）Our neighbour has ____ ours. A. as a big house as
B. as big a house as
C.the same big house as D. a house the same big as （2）she is ______ clever a girl that she can understand it. （3）It is ________ difficult a problem for me to work out. （4）______ nice a day it is! 多好的天啊！
2. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over. 根据例句归纳倍数表示法
(1)____________________________________________________ This tree is three times as tall as that one.
(2)_____________________________________________________The Yangtze River is almost twice longer than the Pearl River. (3)_____________________________________________________
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The new square is four times the size of the old one. (4)_____________________________________________________The size of the new square is four times that of the old one. 4. now that既然，由于 (1)I do it because I like it.
(2)Since you don't trust him,you should not employ him. (3)As it is raining, you’d better take a taxi.
(4)He could not have seen me, for I came here for the first time.
表示原因的短语有哪些？
翻译句子：
1. 污染问题是一个值得关注的问题。（pay attention to） 2. 过马路时要当心车辆。（watch out）
3. 突如其来的暴风雪阻止了我们去登山。（prevent...from...) 4. 如果你坚持学英语的话，总有一天你会说得很流利。（in time） 5. 为了让我们高兴起来，老师带领我们去公园。（cheer up） 6. 既然大家都同意我的计划，我们明天就动身去北京。（now that） 7. 昨天晚上发生了一起火灾。（break out）
8. 大部分证据都毁了。因此，不可能证明这种药物是有害的。（harmful；thus）
9. 令我不解的是他为什么要离开这个国家。（puzzle；名词性从句）
10. 我的收入是他的两倍。(倍数表达法)
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