There is no doubt _________ the world cl...

There is no doubt _________ the world climate has been changing in recent years.

A．that

B．what

C．if

D．whether

A 【解析】试题分析：考查同位语从句。同位词是doubt，that引导同位语从句对doubt的内容进行说明，只是连接，不做成分，句意：毫无疑问世界气候最近几年一直在变化。选A。考点：考查同位语从句

考点分析：

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