C-17：come to nothing 不了了之
A:You must have had a good time in the countryside. I think.
A:我想你在乡下一定玩得很开心。
B:We didn't go there.
B:我们没去乡下。
A:Why?
A:为什么？
B:Because of the bad weather, our travel plans came to nothing.
B:因为天气不好，我们的旅行计划不了了之了。
