Shecleaned the room yesterday.
（ ）Sarah: Bye, Wu Yifan. Wu Yifan:
（ ）你向你的妈妈介绍你的同学Sarah时，你说： A . Hello, Sarah. B. Hello, I’m Sarah. C . This is Sarah.
（ ）当你想向朋友介绍John, 你应该说： A. I am John. B. I am John. C. What is your name?
（ ）早上，你遇到怀特老师，你应该对他说： A .Good morning , Miss White. B.Goodbye , Miss White. C. Good morning , Mr White.
（ ）—— Good morning. —— . A .Hello. B .Good morning. C .Goodbye.
cleaned the room yesterday.cleaned the room yesterday.
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