单选题
Scientists generally agree that the earth's climate will warm up over the next 50 to 100 years ______it has warmed in the 20,000 years since the Ice Age.
【正确答案】
B
【答案解析】解析：句意：科学家们一致认为在接下来的50到100年之内，地球的气温增长将与自从冰河时代以来20，000年之内所增长的温度差不多。as much as差不多。as long as只要。as soon as一…就。as well as也，又。