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

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 finding

D. finding

答案：

(答案→)A. to find

B. find

C. to finding

D. finding

解析：考查非谓语动词。句子意义是“为了找到信息，我不得不阅读全书”。