Question

You'd better take the parcel to the Lost and Found, ________?

1. A.
   hadn't you
2. B.
   would you
3. C.
   wouldn't you
4. D.
   had you

Answer 1

A
had better是一个半情态动词，后面跟动词原形。在表示否定或疑问的时候，直接用had作为助动词。