There is no specific rule ____what we should wear to a dinner pa

There is no specific rule ____what we should wear to a dinner party.
A、because of
B、as to
C、as of
D、but for
【正确答案】：B
【题目解析】：because of因为；as to关于，至于；as of从……开始；but for若不是。句意：对于我们应该穿什么去参加晚宴并没有明确的规定。B 符合题意。