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 Ice Age.
A.so long as
B.as much as
C.as long as
D.as well as
网友回答
B解析这是一个表示同级比较的比较状语从句，因比较的对象是上升的温度，所以B项最佳。句意：科学家普遍认为，在未来的50年到100年间，气候将要变暖，其幅度相当于自冰川期至现在2万年间的气候变化。