(2013·莱州一中期末检测)He didn't expect that his parents could manage to know ________ is going on in his college life on the Internet.

A．how

B．which

C．what

D．that

— Happy birthday!

— Thank you! It's the best present I _______ for. [ ]

A. should have wished 

B. must have wished  

C. may have wished    

D. could have wished