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