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－Is this your pen?

－Yes, ________．

A．this is

B．it is

C．it’s

D．it isn’t

－Is this your pen?

－________．

A．Yes, it's a pen．

B．No．it's my pen．

C．No, it's her pen．

D．Yes, it's her pen．

－Is this your pen?

－________．

A．Yes, it is

B．Yes, it's

C．it is

D．No, it is

－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