647.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
648.I hear they're promoted Tom,but he didn't mention ____ when we talked on the phone.
A.to promote
B.having been promoted
C.having promoted
D.to be promoted
647.答案是A;根据下文I had to read the entire book得知，此题应用动词不定式表示目的。
648.答案是B;mention后常接动名词作宾语，此处被提拔发生在mention之前，故需用动名词完成式的被动语态。
