摘要：( )-Is this your pencil? -Yes, . A.It's B.is C.it isn't D.it is
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Is this your pencil?----- ___________.
| A．Yes, it’s. | B．No, it isn’t. |
| C．Yes, it isn’t. | D．No, it’s not. |
－Is this your pencil box?
－Yes, ________．
[ ]
A．you are good
B．it isn't
C．it's not good
D．thank you
－Isn't this your pencil?
－________．It's Mary's pencil．
[ ]
A．Yes, it is
B．No, it isn' t
C．Yes , it does
D．No, it doesn't