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.

A. as long as
B. as much as
C. as soon as
D. as well as

【正确答案】 B

【答案解析】句子的意思是：科学家们普遍认为，在今后的50年到100年内，地球上气候变暖的程度将达到自冰河时期以来20000年里变暖的程度。much修饰warm。as long as和as soon as都是连词，所以用在句中无论从逻辑上还是从意义上看都不合适。well是副词，但在这里修饰warm也不对。