Some scientists have questioned the theory ______ CO2 is causing dangerous globa

题型：不详难度：来源：

Some scientists have questioned the theory ______ CO₂ is causing dangerous global warming.

A．which

B．what

C．that

D．why

答案

解析

考查同位语从句。同位语从句that CO₂ is causing dangerous global warming修饰名词theory.

举一反三

As long as the laws of nature ______, there will be tornadoes.

A．exist

B．are existing

C．will exist

D．existed

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---- I don’t know, but ______ it is, it’s terrible!

A．whatever

B．however

C．whichever

D．wherever

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______you have got a chance, you might as well make full use of it.

A．Now that

B．After

C．Although

D．As soon as

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A．for

B．when

C．while

D．because

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A．No matter how

B．What

C．No matter what

D．Which

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