她的角色直到第二幕才出现。

Her character doesn't appear until ___Act 2.

一切都进展顺利，直到我们演到阳台那一幕。

Everything was going all right, until we reached the balcony ___act.

这出戏的最后一幕是最戏剧性的。

The final ___act of the play was the most dramatic.