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6.The task will not be fulfilled        we get help from other teams.(  )
A.ifB.unlessC.whenD.since

分析 除非我们得到其他队的帮助,否则任务完成不了.

解答 答案:B
本题考查条件状语从句.根据句意可知,任务完成的条件是我们得到其他队的帮助,所以unless表示除非…否则引导条件状语从句符合题意.if假如;when当…时候;since自从;

点评 考生在答题时要弄清 上下句之见的逻辑性,从而选择合适的连接词.

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