大学四级英语题,急Success may be late in coming,but when it does come

大学四级英语题,急
Success may be late in coming,but when it does come it _____ previous failures.
A.makes up forx05B.stands up forx05C.goes back onx05D.gives up on
I am sorry that he ____ the offer.
A.should refusex05B.has refuse
C.refuses x05D.should have refused
The Arctic was a place where people lived for centuries with no _____ from outside.
A.statementsx05B.conversationsx05C.communicationsx05D.intelligences