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答案 A 答案 C To our amazement，he actually refused to help us. consist in 有说服力的科学证据，即它们事实上是不同的种类。 size differences. 长期以来在科技领域关于这两种大象可能是不同的 种类一事一直存在着争论，但是这是到目前为止最 Previously，many naturalists believed that African savanna elephants and African forest elephants were two populations of the same species，despite the elephants’ significant 答案 C 答案 A 答案 C 答案 C 答案 D be beneficial to from/by for one’s benefit survived her husband If a species spreads wider，its chance of Without the ability to reach out across space， survival will be better. the chance to save ourselves might not exist. 答案 D 答案 A 答案 B 答案 A 答案 B 78. The garden city of Chicago and the garden city of London. by/with migrate surrounding 返回 答案 D 答案 B 答案 C 答案 A 答案 B 答案 A 答案 C 答案 A 答案 D suffer is recognized as at a loss If he can’t do the work，then he is no good to He refuses to face the fact that he has failed and kills himself in the end. his employer，the Wagner Company，and he | 
