当你邀请别人一块去打乒乓球时，你应说：A. I want to play ping-pong. B. Let’s play ping-pong.C. You can play ping-pong.
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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