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

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

解析：考查不定式做目的状语：句意：--这本书给了你需要的信息了吗？--是的，但为了找到它，我不得不读了整本书。选A。