Question

_______ he is always studying hard is well known ____ us all.

A．How, to

B．What, to

C．That, to

D．Whether, by

Answer 1

C

试题分析：考查主语从句和固定短语。本题第一空的that引导的是主语从句That he is always studying hard, that在句中不充当任何成分，只起引导和连接的作用。第二空是没有固定词组be known to sb为sb所知；句意：他总是认真学习这件事情是我们众所周知的。故C正确。
点评：在复合句中做主语的从句叫做主语从句，它的位置与陈述句基本结构中的主语相同。引导主语从句的关联词有：连词：that, whether；连接代词：who, whom, whose, what, which；连接副词：when, where, why, how；复合词：whatever, whoever, whomever, when?蛳ever, wherever, whichever, however.解答这类题目，关键在于分析清楚句子结构。通过判断引导词在从句中所作的成分及意义，来选择正确的引导词。