Green：Excuse me．Are you Mr．Chen?

　　Cheng：No．I’m Cheng Ming．

　　Green：Sorry, Mr．Cheng．Is this Room 12?

　　Cheng：No．This is Room 6．Room 12 is over there．

　　Green：Thank you．

　　Cheng：That’s all right．

　　Green：Excuse me, Miss．Is this Room 12?

　　Miss Li：Yes, it is．Come in, please．

　　Green：Is Mr Chen here?

　　Miss Li：Sorry, he isn’t here today．

　　Green：That’s all right．This is a nice room．

　　Miss Li：Yes, but a little small．

　　Green：How many students are there in this class?

　　Miss Li：We have twelve now．

　　Green：Are they all Chinese students?

　　Miss Li：No, ten are Chinese students．The other two are American．

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