______is known to the world, Mark Twain is a great American writer.A、ThatB、Whic

游客2023-10-13  26

问题 ______is known to the world, Mark Twain is a great American writer.

选项 A、That
B、Which
C、As
D、It

答案 C

解析 as作关系代词,指代整个主句“Mark Twain is a great American writer.”。它引导的非限制性定语从句,既可放在主句前,也可放在主句后。which引导的定语从句必须放在主句后面,故排除B。也可以用it is known to the world that…句型,只需对原句加以修改,去逗号,添that。
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