摘要： classroom

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________ classroom is very big and clean.

A．They

B．There

C．Their

D．Them

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classroom is cleaner than

A. Our; their B. Our; theirs C. Their; our D. Theirs; ours.

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classroom is cleaner than

B．Our; theirs

D．Theirs; ours.

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________ classroom is very big and clean.

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_________ classroom is cleaner than.

A.
Our; their
B.
Their; our
C.
Our; theirs
D.
Theirs; ours

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