It is obvious to the students______they should get well prepared for their futur

题型：不详难度：来源：

It is obvious to the students______they should get well prepared for their future.
A,as      b,which    C,whether      D,that

答案

D

解析

试题分析：通过分析句子结构，可知句子的真正主语是后面的主语从句，it是形式主语，且引导词在主语从句中没有作任何成分，且没有任何实际意义，故用that。
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。