◎ 题干
We mustn't pretend _____ what we don't know.

[     ]

A. know
B. to know
C. knowing
D. to knowing
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“We mustn't pretend _____ what we don't know. [ ]A. know B. to know C. knowing D. to knowing …”主要考查了你对  【不定式】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。