The survival of the civilization as we know is_________threat.

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The survival of the civilization as we know is_________ threat.

A. within

B. under

C. toward

D. upon

参考答案:

B本题考查短语under threat of(在……的威胁之下;受到……的威胁)的用法。题干的意思是:“我们都知道,文明的继续生存受到了威胁。”