1. Before a problem can be solved, it must be obvious ______ the problem itself is. (2011·湖南卷31)
A. what
B. that
C. which
D. why
【解析】选A。空白处后句子缺表语。因此不能选B。B中的that 只起引导作用,无实意。而该句选what既起了引导作用,又作了句子成分表语。
2. It is still under discussion ______ the old bus station should be replaced with a modern hotel or not. (2011·重庆卷22)
A. whether
B. when
C. which
D. where
A. that when
B. that if
C. if when
D. when if
【解析】选B。that引导一个宾语从句,宾语从句中又有一个由if引导的条件状语从句。
1. that引导名词性从句时既无词义也不在从句中作任何成分。
2. that引导主语从句、表语从句、同位语从句时一般不可省,引导宾语从句时常可省。但是, and连接两个由that引导的宾语从句时,第一个that可省,第二个that不可省。
3. that从句一般不作介词的宾语。但: in that “因为”, except / but that“除了”例外。
考点3.whether, if的用法
It's reported that Pakistan is considering ______ to continue its information cooperation with the US because the US didn't inform them in advance before they took action to kill Bin Laden. (2011·成都七中高三最后一套模拟卷)
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