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Scientists generally agree that Earth's climate will warm up over the next 50 to 100 years ________ it has warmed in the 20,000 years since Ice Age.

A.so long as B.as much as
C.as long as D.as well as
科目 英语   题型 单选题   难度 中等
知识点: 从属连词 状语从句综合
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