你什么时候才会来参加我们的聚会？

___When will you come to our party?

我正在做饭时，门铃响了。

I was cooking ___when the doorbell rang.

你既然有时间玩游戏，为什么不先完成作业呢？

Why don't you finish your homework first ___when you have time to play games?

我们到时会通知你。

We will inform you ___when we have the results.