2020届一轮复习人教版必修三Unit4Astronomy-the science of star(2)

While-reading Fast-reading

1．First look at the title and the pictures of the text, and then skim the first sentence of each paragraph and finish the following question. What's the main idea of the text?

The passage mainly tells us the_formation_of_the_earth_and_the_development_of_life_on_it. 2.Match the main idea with the proper paragraph.

(1)Paragraph 1 A．How humans appeared and what effects they had on the earth. (2)Paragraph 2 B．Water is very important to life on the earth. (3)Paragraph 3 C．How the earth formed.

(4)Paragraph 4 D．How the plants and animals on the earth developed.

(5)Paragraph 5 E．It is widely accepted that the universe began with a “Big Bang”． 答案：(1)～(5) ECBDA Careful-reading

Choose the best answers according to the text. 1．This passage is mainly about ________. A．the earth's atmosphere B．the solar system

C．the development of life

D．the difference between the earth and other planets 2．What happened shortly after the “Big Bang”？ A．The earth was just a cloud of energetic dust. B．The earth became a solid ball quickly. C．The earth's atmosphere appeared. D．Water stayed on the moon.

3．What makes the earth different from other planets? A．It's quite warm on the earth. B．There is plenty of atmosphere.

C．Small plants growing on the surface of the water appeared. D．The first oceans and seas were filled with oxygen. 4．When ________， reptiles appeared.

A．the first green plants began to appear on land B．land animals appeared C．the plants grew into forests D．early shellfish developed 答案：1～4 CACC Study-reading

Analyze the following difficult sentences in the text.