◎ 题干
One of the good things about the use of noise-killing system is _________ it saves the need for a silencer.
A.whetherB.thatC.howD.why
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“One of the good things about the use of noise-killing system is _________ it saves the need for a silencer.A.whetherB.thatC.howD.why…”主要考查了你对  【状语从句】【限制性定语从句】【主语从句】【同位语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。