第一课时 阅读理解

2） What is the significance of the presence of water on the earth?

Suggested answers:

1)The explosion of the earth produced water vapour which turned into water when the earth cooled down.

2）It allowed the earth to dissolve harmful gases into oceans and seas.

2.双人互动：讨论并找出文中表述事实或观点的句子各两个。

Fact 1_______________________________

Fact 2_______________________________

Opinion 1_____________________________

Opinion 2_____________________________

参考答案：

Fact 1：Dinosaus died out long before human beings developed on the earth.

Fact 2: They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.

Opinion 1: They are the cleverest animals because they have larger brains than any other creatures on the earth so far.

Opinion 2: The earth may become too hot for life to live on it.

第五步: 概括全文。

1. 用自己的话简单地概括文章大意。

2. 按照课文填空：

After the “Big Bang”, the earth was just a cloud of _______ dust. It __________ loudly with fire and rock, which were _________to produce the water vapour, ___________ and other gases. Then small plants grew. They ___________and filled the oceans and seas 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. When dinosaurs disappeared, ________ became more important. Now small clever animals with__________ appeared and ___________ all over the world. As time went by they covered the earth and they are putting too much carbon dioxide into the__________, which ________heat_________ the earth into space. Whether life will continue on earth for millions of years to come will ________whether this problem can be solved.

参考答案：