题目内容
Task III. Read the text and combine the two halves of the sentences.
1. Atoms A. provided oxygen for the oceans and seas.
2. The earth explosion B. combined and formed stars.
3. The water on Mars C. stops the heat escaping from the earth.
4. The extremely small plants D. could live on land and in the water.
5. Amphibians E. produced carbon dioxide,nitrogen,water vapour and other gases.
6. Reptiles F. suddenly disappeared and no one knows the reason.
7. Dinosaurs G. disappeared later.
8. Carbon dioxide H. mostly lay eggs to produce younger generations.
1-B 2-E 3-G 4-A 5-D 6-H 7-F 8-C