Question

    In what ways has global warming changed our world? Rising sea levels, melting glaciers(冰川) are just a few examples. But did you know that global warming can also bring other changes?

Ending racial(种族的) differences

Global warming causes droughts and poor harvests. This can make people leave their homelands and move to other places. In just 125 years, there may be fewer people with dark skin or pale skin. More people will have brown-colored skin.

Making insects hungrier

When it is warmer, insects’ body temperatures go up along with the outside temperature. This is very different from humans, who can keep their body temperature at a certain level. Higher body temperatures can step up the insects metabolism(新陈代谢). This makes them hungrier, so they need to eat more. And this also makes insects bred(繁殖) more quickly．

Helping scientists find historic sites

Britain had a very dry and hot summer this year because of global warming. After the dry weather turned the country’s green landscape yellow, people noticed some unusual patterns in the middle of a field. That s because grass that grows above them has a different color and height from other grass. This helped people see the patterns. After studying these patterns, scientists found something old and a Roman farm.

1.According to the passage, which skin color will be more common in the future?

A.Dark. B.Pale. C.Yellow. D.Brown.

2.How will global warming make insects hungrier?

A.Because they will grow as big as humans.

B.Because only large insects can live in high temperatures.

C.Because their metabolism will go faster as temperatures are higher.

D.Because they can’t keep their body temperature at a certain level.

3.Because of the hot weather, people in England found______________.

A.new landscapes B.grass with different colors

C.some unusual patterns in a field D.an old country under a field

4.What can we infer from the story?

A.Global warming is not a problem at all.

B.Scientists are happy with global warming.

C.Global warming is happening more quickly.

D.Farmers will face problems because of global warming.

Answer

1.D

2.C

3.C

4.B

【解析】

文章大意：本文讲全球变暖改变了我们的世界，详细介绍了几种鲜为人知的改变——消灭种族差别、使昆虫更饿和帮助科学家找到历史遗址。

1.细节理解题。根据第3段中“More people will have brown-colored skin.”可知棕色皮肤的人类将会更多。故选D。

2.细节理解题。根据第5段中“Higher body temperatures can step up the insects metabolism(新陈代谢). This makes them hungrier”可知，新陈代谢加快导致昆虫更饿。故选C。

3.细节理解题。根据第7段中“After the dry weather turned the country's green landscape yellow, people noticed some unusual patterns in the middle of a field.”可知炎热的天气使英国人发现了田野里的一些不寻常的图案。故选C。

4.推理判断题。ACD选项全文没有提及；根据第6段中“Helping scientists find historic sites”可知全球变暖可以帮助科学家找到遗址古迹，科学家应该会跟高兴。故选B。