The view many scientists hold is too much emission （排放）of carbon dioxide is destructive.
A. which；which
B. that；that
C. that；which
D. what；that
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A. which；which
(答案→)B. that；that
C. that；which
D. what；that
解析： 本题考查名词性从句。句意：许多科学家认为二氧化碳的大量排放会造成破坏性的结果。第一空that/which引导定语从句并在句中作宾语；第二空 that 引导表语从句，that 在句中不作成分。