---Did the book give the information you needed ?--- Yes. But it I had to read the entir

问题补充：

---Did the book give the information you needed ?

--- Yes. But it, I had to read the entire book.

A. to find

B. find

C. to be finding

D. finding

答案：

(答案→)A. to find

B. find

C. to be finding

D. finding

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