摘要：87．Is this a key? , it is.

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— Is this a key? — ________ .

A. No, it isn’t. B. It’s a ruler C. Yes, it’s D. OK

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— Is this a key? — ________ .

A．No, it isn’t.

B．It’s a ruler

C．Yes, it’s

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---Is this a key?
---________.

A.
Its a key
B.
Yes, it's
C.
Yes, it is
D.
No, it's

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—Is this a key?
—______.

[ ]

A. No, it isn't.
B. It's a ruler.
C. Yes, its.
D. OK

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---- Is this a key?

---- ________ .

A. No, it isn’t. B. It’s a ruler C. Yes, it’s D. OK

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