高考英语介词和介词短语练习61
题目内容

The same gestures, signs and so on, in other words, body language, may express different ideas or meanings in different cultures, so don't use them _______ you are definitely sure of what they meanso as to reduce misunderstanding ______ the smallest number.    

2021-07-24

A.until; with

B.unless; to

C.until; by

D.unless; by

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