请选择DCBA)K,h4h:E1P.~*R0d5z5C5z Neither Mary nor her brother _________ good at singing.'Q.H(l5h(e2c)e
A.is'Q.H(l5h(e2c)e
B.are'Q.H(l5h(e2c)e
C.is not'Q.H(l5h(e2c)e
D.are not'Q.H(l5h(e2c)e