Both Smith and Jones ___ fond of music,but neither ___ able to sing well A.is,is B.are,is C.is,areD.are,are

Both Smith and Jones ___ fond of music,but neither ___ able to sing well A.is,is B.are,is C.is,are
D.are,are

B
both and 表示两者都怎么样,其后用复数
neither表二者任选其一都不~表否定的词~强调单数~