题目内容
Don't pretend ________ when you don't.
| A．knowing | B．know | C．to know | D．to knowing |
C
解析试题分析：考查非谓语。句意： 不要不懂装懂。Pretend + to do sth ,假装做某事，所以C正确。
考点：非谓语。
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