( )（1） We have two new friends _____ our class .A. at B. on C. in
A. I have a ruler. B. Really? I like it. C. Guess!
A. This is Mike! B. Good afternoon. C. Good morning.
A. Bye-bye. B. You are welcome. C. 0K!
A. Sure. Here you are! B.Thank you! C. No, thanks.
A. OK ！ B. Thank you ! C. Here you are.
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