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A: Can I help you?
B: I lost my book﹨ ruler ﹨ pencil-box...
A: English book or Chinese book? ﹨ big or small ﹨
red or blue...
B: English book.﹨ big﹨ blue ..
A: Is this your...?
B: No, it isn’t.
A: Is this your...?
B: Yes, it is.
A: Here you are.
B: Thank you.
A: You are welcome. Put it away.
B: OK,I will.
Putting your things away after using（使用）is a good habit（习惯）.