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17．________ thoroughly，the garden looked more beautiful than ever before．（　　）
A．CleaningB．Having been cleaned
C．Having it cleanedD．He had cleaned it

分析 徹底清掃后，這個花園看上去比以前更漂亮了．

解答 答案：B
該題考查非謂語動詞作成分，本題首先排除D，因為在一個句子中如果沒有并列連詞（并列句）和關(guān)系詞（復(fù)合句）連接是不允許存在兩套主謂結(jié)構(gòu)的，分析該句句子結(jié)構(gòu)可知____ thoroughly在句中作狀語，又因主句主語the garden與clean存在邏輯上的動賓關(guān)系，故應(yīng)使用過去分詞或現(xiàn)在分詞的被動式作狀語，所以排除A和C，由于非謂語動作clean在謂語動作look之前發(fā)生，所以應(yīng)使用現(xiàn)在分詞的完成式，故選B．

點評 考查非謂語作成分時，一定要注意兩點：1、非謂語動詞在句中作什么成分；2、非謂語動詞與邏輯主語存在的關(guān)系（主謂或動賓）

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