because

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.

我喜欢冬天，因为我可以在雪里玩。

I like winter ___because I can play in the snow.