Bill and Sue (A.is B.have C.are D.has) brother and sister .

问题描述:

Bill and Sue (A.is B.have C.are D.has) brother and sister .

are

C

应该选择C.
因为Bill and Sue是两个人,为复数形式,所以不能用A.
另外brother and sister.是兄妹的意思,前面没有数量词,所以不会是Bill and Sue有兄妹的形式.所以排除B.而D.是单三形式,不能用.