Have you ever dreamed of __________ such a good chance for t

Have you ever dreamed of __________ such a good chance for the education abroad?
A.there is B.there to be C.there will be D.there being
为什么会选C?
This is a very interesting book.I’ll buy it __________.
A.how much may it cost
B.no matter how it may cost
C.however much it may cost
D.no matter how it may cost
选C.为什么B不对呢?
_________team wins on Sunday will go through to the national championships.
A.No matter what
B.No matter which
C.Whatever
D.Whichever
选D,为什么B不对?