摘要: 理清句子的逻辑意义很重要.while明显错误.A.C的干扰性较强.但如果是原因状语从句.那么本题的从句应该是否定句才合逻辑.因此A.C排除.unless = if not.因此本句实际上就是If there is not anyting else to discuss, I’ll declare the meeting closed.
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