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The conference has been held to discuss the effects of tourism ______ the wildlife in the area.


  1. A.
    in
  2. B.
    on
  3. C.
    at
  4. D.
    with
B
解析:
首先分析該題的句子結(jié)構(gòu),該句用了被動語態(tài),不定式to discuss作目的狀語,the effects…是不定式discuss的賓語,該空格中要填的介詞應(yīng)與effect有關(guān)。從左欄的歸納辨析可以看出,表示“對……有影響”時,effect與介詞on連用。后半句句意為“旅游業(yè)對該地區(qū)野生動植物的影響”。
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