2．--Do you know _____ Mr．Black's address is？
--He may live at No.18or No.19of Bridge Street．I'm not sure of_____．（　　）
A．where，whichB．where，whatC．what，whichD．what，where

分析 --你知道布萊克先生的地址是什么？
--他也許住在橋街18號(hào)或19號(hào)．我不確定．

解答 答案為C．本題考查名詞性從句中引導(dǎo)詞的運(yùn)用．what在名詞性從句中可做主語(yǔ)、賓語(yǔ)、表語(yǔ)或定語(yǔ)，表示"所、什么"； 第一空的賓語(yǔ)從句中缺少的是表語(yǔ)，故用what；where在句中做狀語(yǔ)，由此排除A和B；第二空用which做賓語(yǔ)表示"選擇"，答案是C．

點(diǎn)評(píng) 名詞性從句考查的關(guān)鍵是連接詞的選用和語(yǔ)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(yǔ)序．

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