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【单选题】
打招呼( )A.
我见了熟人都是点点头致意，觉得寒暄几句没意思，还耽误时间。
B.
我们住在一个大院里，虽然算是认识，又不在一个单位，也没有什么交往，见面打招呼总觉得很勉强。
C.
我们在一个单位工作，一天又多次见面，还打什么招呼。
D.
我见了熟人因为关系不同就用不同的方式打招呼，有的点点头，有的还要问候一番。
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