People always shake hands and say“How do you do? when to each other. [ ] A.intro
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![People always shake hands and say“How do you do? when to each other. [ ] A.intro](/pic/43_993488.jpg)
People always shake hands and say“How do you do?”when ________ to each other.
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A.introducedB.introducingC.introduceD.to be introducing试题答案
答案:A
解析:when+introduced在此处相当于when they are introduced… |