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    【题目】It's great fun to go hiking in the valley, but ________ we shouldn't turn a blind eye to the potential risks.

    A. on the other hand

    B. on the contrary

    C. as a matter of fact

    D. as a result

    【答案】A

    【解析】

    试题分析：考查固定词组。A. on the other hand另一方面；B. on the contrary相反；C. as a matter of fact事实上；D. as a result结果。句意：去山谷徒步旅行是很大的乐趣，但是，另一方面我们不应该对潜在的风险视而不见。根据句意可知选A。

    【知识拓展】

    1.as a result结果；as a result of由于……。

    2.in fact事实上；in reality实际上；as a matter of fact事实上。

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