We mustn't pretend _____ what we don't know. [ ]A. know B. to know C. knowing D. to knowin

题目简介

We mustn't pretend _____ what we don't know. [ ]A. know B. to know C. knowing D. to knowin

题目详情

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

[     ]

A. know
B. to know
C. knowing
D. to knowing
题型:单选题难度:中档来源:期中题

答案

B

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