I______you with the funds. Why didn't you ask me?
A.could have provided
B.should have provided
C.must have provided
D.ought to have provided

单项选择题It's a______ difficult exam, but we could still cope with it.A.fairlyB.tooC.ratherD.enough

单项选择题网络中的ＡＲＰ的作用是在给定（ ）时，找到（ ） A、域名，因特网地址； B、网络识别号，因特网地址； C、站点MAC地址，因特网IP地址； D、因特网IP地址，站点MAC地址；