In interpersonal communication, a smile is usually a sure________ of a friendly and open attitude.
In interpersonal communication, a smile is usually a sure________ of a friendly and open attitude.
A、mark
B、way
C、label
D、sign
【正确答案】:D
【题目解析】:sign的意思是“迹象”。原句的意思是“在人际交往中,微笑无疑是友好和开放态度的标志”。因此,我们选择D. sign。
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