Methane is a gas. It has no smell. People cannot see it. It still makes big changes on the world’s temperature(温度).

Methane has much more warming power than carbon dioxide(二氧化碳) . This means that methane makes the Earth warmer than carbon dioxide. Methane causes about 25% of the growth in the world’s temperature.

People can change this situation. It is not necessary to make better technologies(技术) or to buy less. The solution(解决方案) is easier. Methane is a natural gas in big oil and gas fields. Methane can easily go into the air. Scientists and experts(专家) with cameras can find the places. Some methane comes out there. Companies can fix the methane pipes(管道) with problems.

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1.Which of the following about methane is TRUE?

A It is very hot.

B It is a kind of water.

C It has no colour.

D People can smell it.

解析：选C。C 推理判断题。根据第一段People cannot see it.可知，人们看不见甲烷，由此说明它是无色的，故选C。

2.What can we learn from Paragraph 2?

A Methane is from carbon dioxide.

B Methane can make the Earth warmer.

C Methane can become carbon dioxide.

D Methane is better than carbon dioxide

解析：选B。B 细节理解题。根据第二段This means that methane makes the Earth warmer than carbon dioxide.可知，这意味着甲烷比二氧化碳更能让地球变暖。故选B。

3.The underlined part “The solution” refers to(指的是)______.

A taking pictures

B buying less methane

C making better technologies

D fixing the methane pipes

解析：选D。D 词意指代题。根据最后一段可知, 甲烷很容易进入空气中，科学家和专家用摄像头可以找到那些地方，一些甲烷从那里出来，公司可以修复有问题的甲烷管道。故选D。

4.There is probably lots of methane______.

A in the air

B in the nature

C in the water

D in the oil and gas fields

解析：选D。D 细节理解题。根据最后一段Methane is a natural gas in big oil and gas fields.可知，甲烷是大型油气田中的一种天然气。故选D。

5.This passage is probably from______.

A a story book

B a science book

C a travel magazine

D a history book

解析：选B。B 推理判断题。根据全文内容可知，本文讲述了甲烷气体排放与全球升温变暖之间的关系，就其内容而言是属于科普类文章，故选B。