_____ is certain is ______ the mystery of Stonehenge has never been fully explained.
A.It, thatB.What, what
C.It, whatD.What, that
D

試題分析:考查名詞性從句。本題第一空what引導(dǎo)的是主語從句what is certain,在句中做主語。第二空that引導(dǎo)的是表語從句,that在表語從句中不充當(dāng)任何成分,只起引導(dǎo)的作用。句意:確定的事情是巨石陣的秘密到現(xiàn)在為止還沒有被完全解釋。故D正確。故D正確。
點(diǎn)評(píng):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(gè)易懂易理解的句子,幫助判斷。
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