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___ she couldn’t understand was ___fewer and fewer students showed interest in her lessons.
A.What; whyB.That; whatC.What; becauseD.Why; that
A

试题分析:考查主语从句和表语从句:第一空填what,引导主语从句,主语从句中缺少宾语,第二空填why,是根据句意判断的:她不能理解的是为什么越来越少的学生对她的课感兴趣。选A。
点评:如果主语从句缺少主宾表,用what连接主语从句,如果不缺成分,用that连接,引导主语从句的that在从句中不做成分,只起到连接的作用,学生要会分析句子成分。表语从句也是这样。
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