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The fact has worried many scientists _____ the earth is becoming warmer and warmer these years.

A.whichB.thatC.asD.what

B

解析試題分析:考查名詞性從句的同位語從句。本題的That引導同位語從句that the earth is becoming warmer and warmer these years解釋名詞the fact的內容,句意:這些年來地球變得越來越熱這個事情讓很多科學家很擔憂。That在同位語從句中不充當任何成分,只起引導作用。故B正確。
考點:考查同位語從句
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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