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3．All the preparations for the work_______，we're ready to start．（　　）

	A．	are completed		B．	have been completed
	C．	completed		D．	had been completed

分析所以準備工作都完成了，我們準備出發．

解答答案：C 題干中有逗號分隔，沒有連詞，要用非謂語動詞；句中complete與work之間構成動賓關系，要用表示被動的過去分詞；分詞帶有自己的邏輯賓語，是一個獨立主格結構．故選C．

點評獨立主格結構由兩部分組成，前一部分是名詞或者代詞，后一部分是非謂語動詞（不定式、現在分詞、過去分詞）或形容詞、副詞、名詞或介詞短語．獨立主格結構本身不是句子，在句子中作狀語，表時間、原因、條件、伴隨、目的及狀態等．

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