摘要： I am sorry, I don’t know.

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---- Where _______ my books?

---- Sorry, I don’t know.

A. is B. am C. are D. be

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Sorry,I ________ know the girl.

A.
don't
B.
not
C.
am not
D.
can't

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—What shall we do then?
—I am sorry, I don't know ______ to do.

A. how
B. what
C. which
D. when

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Sorry,I ________ know the girl.

[　　]

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Sorry,I ________ know the girl.

[　　]

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