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 asB．a(chǎn)s much as
C．a(chǎn)s long asD．a(chǎn)s well as
B
這是一個表示同級比較的比較狀語從句，因比較的對象是上升的溫度，所以B項最佳。
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