我们不能去茱莉亚的派对，因为我们那个周末要离开。

We can't go to Julia's party ___because we're going away that weekend.

他做了这件事，因为卡洛斯告诉他这么做。

He did it ___because Carlos told him to.

我将在7:30到你家，因为我之前有个约会。

I will be at your house at 7.30 ___because I have an appointment before that.