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

发布时间：2020-08-16 21:05:38

Some scientists have questioned the theory      CO2 is causing dangerous global warming.
A. which
B. what
C. that
D. why

网友回答

A. which
B. what
(答案→)C. that
D. why
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.
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