----Is this your pen?
---- .It’s Tony’s pen.
| A．Yes, it is | B．No, it isn’t |
| C．Yes, I am | D．No, I am not |
----Is this your pen?
---- .It’s Tony’s pen.
| A．Yes, it is | B．No, it isn’t |
| C．Yes, I am | D．No, I am not |
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