Definition: at some time in the future Level: B1
我想有一天再去巴黎。
I'd like to go to Paris again ___one ___day.
我希望有一天我能说流利的西班牙语。
I hope ___one ___day I can speak fluent Spanish.
也许有一天我们会住在火星上。
Maybe ___one ___day we'll live on Mars.
