用when while造句

I'd like to know when they'll let him out。我想知道他们什么时候放他。There were times when I didn't know what to do。有些时候我不知道该怎么办才好John got engaged to her when travelling last winter。去年冬天旅行时,约翰与她订了婚。Don't get excited when you talk。你说话时别激动。How can he get the promotion when his boss dislikes him?既然上司不喜欢他,那他怎么会获得提升呢?I had only fifteen dollars on me when the book I wanted cost twenty。我身上只带了十五美元,可是我想买的那本书定价二十美元。