题目内容：

they haven't decided on it that go to beijing?这样对吗

优质解答

这样子修改一下才对哦：
they haven't decided whether to go to beijing or not.
他们还没决定好要不要去北京.
祝好!
不懂建议重新提问,

追问：

they haven't decided whether to go to beijing or not. they haven't decided on whether to go to beijing or not.有区别吗？？

追答：

不用on on 后面加名词，这里不合适。