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题目
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Because of global warming, the ice that polar bears depend on for survival _______.
A.are slowing disappearingB.is slowly disappearing
C.are slowly disappearedD.have slowly disappeared

答案
B
解析

核心考点
试题【Because of global warming, the ice that polar bears depend on for survival _____】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三

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