9．-The hall___ for international conferences is of great importance．
-I see，and we are sure to complete it on time．（　　）
A．builtB．to be built
C．having been builtD．building

分析 -為國際會議建造的大廳非常重要．-我知道，我們保證按時完工．

解答 答案：B 句中build修飾名詞hall，兩者構(gòu)成動賓關(guān)系，要用被動；句意表達(dá)build的動作還未完成，不能用過去分詞，過去分詞表示被動完成的動作．故選B．

點評 動詞不定式是非謂語動詞是一種，表示未發(fā)生的動作，用法較多．常用來作定語，主語，賓語，補(bǔ)語，狀語等．本題中用來作后置定語．

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