I wish that you ______ such a bad headache, then you would have enjoyed the concert.  [ ]

A. hadn't had  

B. didn't have  

C. shouldn't have

D. won't have

化学萃取即溶质根据相似相溶的原理在两相间达到分配平衡，萃取剂与溶质之间不发生化学反应。