题目内容
【题目】We mustn't ______ a person all the time. It's not polite.
A. look after B. stare at C. smile to D. find out
【答案】B
【解析】
句意：我们必须不能一直盯着一个人看，那是不礼貌的。A. look after照顾了；B. stare at盯着---；C. smile to 对---微笑；D. find out弄清楚；根据It's not polite可知是盯着看；故选B
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