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 Bynow,noonehascomeupwitha(n)

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问题详情:

 Bynow,noonehascomeupwitha(n)

 By now, no one has come up with a(n)_____ explanation of why dinosaurs died out, and it remains a mystery.

    A. astonishing          B. amusing              C. convincing           D. puzzling

【回答】

C

知识点:形容词

题型:选择题

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