问题描述：
---Did that book provide the informaton you needed?---Yes,but___,we had to read it carefully.
---Did that book provide the informaton you needed?
---Yes,but___,we had to read it carefully.
A.for finding it B.to find it
这是道单选题,为什么A不对?
---Did that book provide the informaton you needed?
---Yes,but___,we had to read it carefully.
A.for finding it B.to find it
这是道单选题,为什么A不对?
问题解答：
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