7._____he will come to help us is not clear.(  )
A.ThatB.WhetherC.EitherD.What

分析 他是否會(huì)來幫助我們還不清楚.

解答 答案為B.本題考查名詞性從句中引導(dǎo)詞的運(yùn)用.題干中is前為主語從句,空格處需要的是引導(dǎo)主語從句的引導(dǎo)詞,either不引導(dǎo)名詞性從句,故排除C;由下文中not clear判斷句中需要疑問意義的引導(dǎo)詞,that不表示疑問,故排除A;What在從句中做主語或賓語,但是本題主語從句中成分完整,所以用不擔(dān)任成分的whether表示"是否",故選B.

點(diǎn)評(píng) 名詞性從句考查的關(guān)鍵是連接詞的選用和語序,因此,我們首先要搞清從句的性質(zhì),掌握各連接詞的用法,在此基礎(chǔ)上判斷.此外,關(guān)注名詞性從句用陳述語序.

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