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    【题目】There are fewer and fewer tigers in India. There will be no tigers left________ humans stop hunting them for their fur and bones.

    A.unlessB.ifC.becauseD.since

    【答案】A

    【解析】

    句意：印度虎越来越少了，这种情况会持续下去，除非人类停止为了虎皮和虎骨的猎杀。

    A. unless除非，B. if如果，C. because因为，D. since自从。本题考查的是从属连词的辨析。根据题意，从前半句“这周情况会持续下去”和后半句“人类停止因为虎皮和虎骨的猎杀”来看，这里需要一个表假设的连词，故选C。

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