Earth has warmed by about

 Earth has warmed by about 1oF over the past 100 years. But why? And 41 ?
 Well, scientists are not exactly sure.
 The Earth could be getting warmer on its own, 42 many of the world’s leading climate
scientists think that things people do are helping to make the Earth warmer.
Global warming refers to an average increase in the Earth’s temperature,
  43 in turn causes changes in climate.
A 44 Earth may lead to changes in rainfall patterns,
a rise in sea level, and a wide range of impacts on plants, wildlife, and humans.
When scientists talk about the issue of climate change, their 45 is about
global warming caused by human activities.
It is because they are sure about the danger of the green house effect.

【】41. quick now how where
【】42. but so or for
【】43. and it not which
【】44. crowded flat round warmer
【】45. story increase climate concern

【3】【1】【4】【4】【4】

He referred all his troubles to bad luck

The applicants were summoned in turn to see the examiner

The letter is chiefly concerned with export commodities .

As I was about to say when you interrupted me . . .


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