Who taught __maths last year?A.they B.their C.them D.theirs相信社会好人多
问题描述：
Who taught __maths last year?A.they B.their C.them D.theirs
相信社会好人多
答
C，因为taught是动词，后面应该接宾语
答
C作宾语，用宾格．
答
c.