摘要： Is this your backpack?

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_____________ , is this your backpack？

A. Sorry B. I’m sorry C. Excuse me D. Hello

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_____________ , is this your backpack？

B．I’m sorry

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---Is this your backpack?
---________.

A.
Yes, it's
B.
Yes, it is
C.
Yes, is
D.
It is

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—Is this your backpack? It's beautiful.
— _______.

A. Not good
B. Just so so
C. Thank you
D. No

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— _____, is this your backpack?
— Yes.

[ ]

A. Sorry
B. I'm sorry
C. Excuse me
D. Thanks

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