are

A farmer and a worker 主语2个人 要用are
be going to do表示将来
如果帮到你,请记得采纳,O(∩_∩)O谢谢可答案给的是is答案错了a boy and a girl are comingA farmer and a worker 指的是两个人 如果是A farmer andworker 则是一个人