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    【题目】He decided not to say anything at the meeting unless ________.

    A．asking to B．to ask to C．asked to D．ask to

    【答案】C

    【解析】考查动词不定式的省略。句意为：他决定在会上什么也不说，除非被请求。unless asked to相当于 unless he was asked to say something。

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