组卷网 > 高中英语综合库 > 语法 > 句法 > 复合句 > 名词性从句 > 主语从句 > 主语从句的连接词
题型:单项选择 难度:0.4 引用次数:849 题号:2035396
________is known to us is that tobacco contains nicotine and other harmful products, so you should give up smoking.
A.AsB.It
C.WhatD.Which
2014·山东·一模 查看更多[5]
【知识点】 主语从句的连接词

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