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1、（新人教版）高中英语必修三Unit4Astronomy the science of the stars精品试题Step1 Revision: Fill in the blanks according to the reading passage.After the “Big Bang”, the earth was just a cloud of energetic dust. It exploded loudly with fire and rock, which were _to produce the water vapour, carbon dioxide and other gas
2、es. Then small plants grew .They_and filled the oceans and seas with oxygen. Many millions of years later the first green plants began to appear on land. When the plants grew into forests, reptiles appeared for the first time. They produced young generally by _eggs. When dinosaurs _on the earth for
3、more than 140 million years and disappeared, mammals became more important. Now small clever animals with hands and feet appeared and spread all over the world. As time go by they covered the earth and they are putting too much carbon dioxide into the _, which _heat _ escaping from the earth into sp
4、ace. Whether life will continue on earth for millions of years to come will depend on whether this problem can be solved.Step2 words and expressions1. in time 【原文再现】They were in time to produce carbon, nitrogen, water vapour and other gases, which were to make the earths atmosphere.句子分析：which were t
5、o make the earths atmosphere 是_成分，指代_【归纳】in time 来得及；总有一天，迟早 例如：I was just in time for the flight._ (translation)I will see him in time_ (translation)【拓展】与time 有关的短语 in no time 立即，立刻 at any time 在任何时候at one time 曾经，一度 at times 有时，偶尔 on time 按时，准时 of the time 现在的，当时的 【即学活用】1) If you keep on, youll su
6、cceed_. (93年全国卷I) A. in time B. at one time C. at the same time D. on time 2. multiply(1)【原文再现】They multiplied and filled the oceans and seas with oxygen, which encouraged the later shellfish and all sorts of fish. (2)Using this method, youll find the efficiency is multiplied several times (3)7 mult
7、iplied by 8 is 56 【归纳】multiply的含义是：（1）_(2)_(3)_ 【即学活用】_9_3,and the product is 27. 3. lay 【原文再现】They produced young generally by laying eggs【拓展】 1) 放，置 lay it on the table ; 2) 摆放好to lay the table ; 3) 产，下（蛋）The hen laid three eggs【辨析】原形单数过去式过去分词现在分词中文释义lieliesliedliedlying撒谎lielieslaylainlying躺，位于la
8、ylayslaidlaidlaying产蛋，放置【即学活用】They _ us _ for three months. A .Laid off B. laid down C. laid on D. laid out4. exist(1)【原文再现】They laid eggs too and existed on the earth for more than 140 million years.(2)The laid-off workers mainly exist on bread and tea.(3)This kind of trees only exists in China.【归纳
9、】1). exist（ on sth）生存，活下来，幸存; 靠 为生 2).exist in sth 存在于之中3).existence n.存在 ; 生活.【即学活用】People do not now believe in the _of ghosts.A. birth B. evidence C. existence D. occurrence5. atmosphere(1)【原文再现】 they are putting too much carbon dioxide into the atmosphere(2)The atmosphere changed as soon as she
10、walked in.【归纳】atmosphere 为名词，其含义是：1)_ 2)_其形容词形式为atmospherictmsferk adj.大气的e.g. atmospheric pressure 大气压力。【即学活用】 The top leaders of the two countries are holding talks in a friendly_（22湖北08） A. atmosphere B. state C. situation D. phenomenon6. prevent from 【原文再现】which prevent heat from escaping from t
11、he earth into space【注意】prevent后面跟名词和代词作宾语，在宾语后可跟from doing，from可以省略。因此prevent sb（ from） doing 和prevent sb/sb doing 都可以。【辨析】preventfrom ，stopfrom ，keepfrom三者意思相近，常可互换，preventfrom和stopfrom用于主动语态时from可以省略，但用于被动语态时不可省略；keepfrom 中的from不能省略。【即学活用】Nobody can stop me _the tennis match on my radio.A. to list
12、en B. listening C. listen to D. listening to待添加的隐藏文字内容1Step3 Discovering useful words and expressionsDeal with “Discovering useful words and expressions” of the textbook.Step4 Discovering useful structures：Noun clauses as the subject 1. study the rule:(1) What part does the underlined part serve as
13、in each sentence? 1) A tree has fallen across the road. 2) You are a student. 3) To find your way can be a problem. 4) Smoking is bad for you.In group 1, the underlined part serves as_. 1)“How do you do?” is a greeting.2) What she said is not yet known.3)That we shall be late is certain.4) It is cer
14、tain that we shall be late.In group 2, we can see from these sentences that a sentence serves as _, so we call it _.(2) Sentences- making practiceIt is certain. We will be late (that)e.g It is certain that we will be late Is she coming or not? We dont know.(whether)What does he want to tell us? We don
