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People always shake hands and say “How do you do?” when ______ to each other.

分类: 作业答案 • 2021-12-30 14:29:05
问题描述：

People always shake hands and say “How do you do?” when ______ to each other.
A.introduced B.introducing C.to be introduced D.to be introducing
为什么

答

应该选A.
完整的句子是：
People always shake hands and say “How do you do?” when they are introduced to each other.
意思是：被介绍给别人的时候,人们经常会摆着手说：”.
这里省略了they are,直接填introduced就行.

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