谁进入了半决赛？

Who's in the ___semi-finals?

她是有史以来最年轻的打入半决赛的选手。

She's the youngest player ever to get through to a ___semi-final.

一个周日的早晨，我们不得不与[我们的]劲敌进行杯赛半决赛。

One Sunday morning we had to play the cup ___semi-final against [our] great rival.