阅读对话,判断下面句子的正误。
Mike: Good morning, Mr Wang.
Mr Wang: Good morning, Mike.
Mike: This is my friend, Sarah. Sarah, this is our teacher, Mr Wang.
Sarah: Nice to meet you, Mr Wang.
Mr Wang: Nice to meet you, too. Are you a new student?
Sarah: Yes, I am.
Mr Wang: Where are you from?
Sarah: I'm from the USA.
Mr Wang: Oh! Welcome.