问题描述：
一道英语语法题,
Mrs Smith and her twins ( )the dancing club.
A.is going to join B.is going to join in C.are going to join D.are going to join in
求答案并分析
Mrs Smith and her twins ( )the dancing club.
A.is going to join B.is going to join in C.are going to join D.are going to join in
求答案并分析
问题解答：
我来补答展开全文阅读