______ man can now create radioactive elements, there is nothing he can do to re

游客2024-10-14 25

问题 ______ man can now create radioactive elements, there is nothing he can do to reduce their radioactivity.

选项 A、As
B、Whether
C、While
D、Now that

答案 C

解析状语从句。此处应该是一个让步状语从句，所以选择while。whether引导名词性从句，意为“是否”；now that表示“既然”，引导条件状语从句；as可以引导时间和让步状语从句，但用法与while不同。

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______mancannowcreateradioactiveelements,thereisnothinghecandotore