2025-2025 年名词性从句综合分类解析(1)一、名词性从句1 ． is known to all is that the earth is smaller than the sun. A. As B. What C. It D. Which【答案】 B 【解析】【分析】句意：众所周知地球比太阳小。 is known to all 是主语从句，从句中缺少主语，因此用 what，选 B。 【点评】考查名词性从句，本题涉及 what 引导的主语从句。2 ． _____ is known to us all is that China has launched Shenzhou VII spaceship, ____ made the country's first spacewalk successful. A. That; what B. What; which C. It; which D. As; that【答案】 B 【解析】【分析】句意：众所周知，中国已经发射了神州 7 号宇宙飞船，这是中国首次成功的太空行走。第一空处为主语从句，从句缺少主语，需用 what 引导；第二空所在句子是个定语从句，先行词为整个主句的内容，从句中缺少主语，需用 which 引导。故选 B。 【点评】考查名词性从句和定语从句，本题涉及主语从句和非限制性定语从句的应用。3．Some people believe _______ has happened before or is happening now will repeat itself in the future. A. whatever B. whenever C. wherever D. no matter what【答案】 A 【解析】【分析】句意：一些人认为之前发生的或现在正在发生的任何事情在将来都会重复发生。Whatever has happened before or is happening now 是一个主语从句，whatever 既引导起这个主语从句，也在句中做主语。BC 项都属于副词的性质，都不能做主语，通常只能做状语；no matter what 只能用来引导状语从句，故选 A。 【点评】考查名词性从句，本题涉及"特别疑问词+ever"引导的主语从句。4．Has it been announced ______? A. when are the planes to take off B. that are the planes to take offC. where are the planes to take off D. when the planes are to take off【答案】 D 【解析】【分析】句意: 飞机什么时候起飞已经宣布了吗？此处是 when 引导的主语从句，且要用陈述句语序，故选 D。【点评】考查名词性从句，it 作形式主语，关系副词 when 引导的从句作真正的主语。5．Located between the 16th and the 18th floor, ______ I call my “home” is more like a ...
