None of his promises ______carried out.

None of his promises ______carried out.
A、has being
B、have
C、has
D、have been
【正确答案】：D
【题目解析】：None做主语时，谓语动词既可以用单数也可以用复数，这要取决于说话人的看法。故此题用has been或者have been都可以。