Question

The rise in temperature is a result of the greenhouse effect (温室效应). And it helps keep the earth warm enough for people， plants and animals to live on. There are some natural gases like CO2 around the earth. These gases create (产生) something like a blanket around us. The blanket lets in the heat (热量) of the sun and keeps it near the ground. It is like how a real greenhouse works.

It is important to understand the greenhouse effect. Some of the things we do every day can change the temperature of our earth. If factories， cars， and other things are making lots of new waste gases， the earth will get warmer. In the end， it will become too hot for us to live on.

1. The underlined word “it” in the passage means _______.

A. the temperature of the earth

B. what many scientists think

C. the greenhouse effect

D. the gas around the earth

2. The blanket around us is made up of _______.

A. wood    B. plants          C. gases        D. sunlight

3.Which is the best title for the picture?

A. How a Greenhouse Works

B. Planting Flowers in a Greenhouse

C. Why the Heat Gets Trapped

D. The Importance of the Sun

4.Where is the passage probably taken from?

A. A weather report.      B. A fashion magazine.

C. A doctor’s diary.     D. An environmental article.

Answer

1.C

2.C

3.A

4.D

【解析】

试题分析：短文大意：该文主要介绍了温度的上升是温室效应的结果。我们必须能采取措施来控制温室效应防止地球变暖。

1.C词义猜测题。根据前句The rise in temperature is a result of the greenhouse effect可知it指代的是“温室效应”，所以选C。

2.C细节理解题。根据第一段中These gases create (产生) something like a blanket around us.可知这些气体在我们周围创建了像毯子一样的东西。所以选C。

3.A标题归纳题。根据图中的文字可知该图示说明了温室效应的工作原理，所以选A。

4.细节理解题。根据该文主要介绍温室效应可知它最有可能出自于有关环境的论文，所以选D。

考点：环境保护类短文阅读。