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

試題分析：考查主語從句和表語從句：第一空填what，引導(dǎo)主語從句，主語從句中缺少賓語，第二空填why，是根據(jù)句意判斷的：她不能理解的是為什么越來越少的學(xué)生對她的課感興趣。選A。
點評：如果主語從句缺少主賓表，用what連接主語從句，如果不缺成分，用that連接，引導(dǎo)主語從句的that在從句中不做成分，只起到連接的作用，學(xué)生要會分析句子成分。表語從句也是這樣。
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