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18．The team，______ to climb the world's second tallest mountain twice，finally decided to give up．（　　）

	A．	having attempted		B．	attempting
	C．	attempted		D．	to attempt

分析在兩次嘗試爬上世界第二高峰后，這支（登山）隊伍最終決定放棄．

解答答案：A
題干中attempt和主語team之間構成主謂關系，要用主動；句意表達的attempt動作發生在decide之前，要用完成式．故選A．

點評現在分詞是非謂語動詞的一種，表達主動或進行；過去分詞表達被動或完成；動詞不定式表達未發生的動作．學習時，要注意區分和掌握．

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