Question

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

A．which

B．what

C．that

D．whether

Answer 1

B

試題分析：考查主語從句。本題的what引導(dǎo)起主語從句what happens at home，并在句中作主語。CD兩項(xiàng)不能在句中做主語，which是指特定范圍之內(nèi)的某一個。故B正確。
點(diǎn)評：名詞性從句的考查集中在引導(dǎo)詞的選擇上，連接詞that, whether, if在句中不充當(dāng)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(yīng)從上下句的句法關(guān)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(shí)，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。