Some researchers believe that there is no doubt______ recycling saves energy and raw mater

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Some researchers believe that there is no doubt______ recycling saves energy and raw materials, and reduces pollution.

A.which

B.that

C.what

D.whether

请帮忙给出正确答案和分析,谢谢!

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答案解析

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  • 正确答案:B
    句子结构分析题。名词doubt“怀疑”后的同位语从句用whether连接,如:Thereissomedoubtwhetherhecanrecoverfromtheseriousdisease.在nodoubt“不怀疑”之后的同位语从句用that连接。答案为B。