问题描述：
19.We are very tired.Could you find us some chairs ___.的用法
19.We are very tired.Could you find us some chairs ___.
A.to sit B.to sit on C.for sitting D.to be sat on
19.We are very tired.Could you find us some chairs ___.
A.to sit B.to sit on C.for sitting D.to be sat on
问题解答：
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