Which one could be a possible thesis statement? A: The importance of combating air pollution B: It is important to take every possible means to prevent air pollution on the earth. C: Many cars produce millions of tons of carbon dioxide each year. D: Air pollution is a serious problem in all the countries in the world.

Deserts ______. A: get very little rain B: never have any plants or animals in them C: can all be turned into good land before long D: both A and C

Which of the following is not caused by global warming? A: rising of sea levels B: melting of icebergs C: extinction of some animals D: serious water and air pollution

People,animals and plants will die when_______.

From the passage, we learn that<br/>_______________. A: all plants can eat people B: all plants can eat<br/>animals C: some plants can eat people some plants can eat<br/>animals