Research shows that though students benefit from having parents involved at school, _____ happens at home matters much more.

A.whichB.whatC.thatD.whether

B

解析試題分析:考查主語從句。本題的what引導起主語從句what happens at home,并在句中作主語。CD兩項不能在句中做主語,which是指特定范圍之內的某一個。故B正確。
考點:考查主語從句的連接詞
點評:名詞性從句的考查集中在引導詞的選擇上,連接詞that, whether, if在句中不充當任何成分,只起連接作用;連接代詞who(ever), which(ever), whom(ever),whose(ever),what(ever)在句中做主語,賓語,表語和定語;連接副詞when, why, where, how,在句中做狀語。應從上下句的句法關系著手分析,切不可‘望句形生答案’總的來說,考生在解答此類型時,可用排除法或造句法,造句法就是仿造原句的語法功能仿造出一個易懂易理解的句子,幫助判斷。

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