葡萄牙语是葡萄牙的官方语言。

___Portuguese is the official language of Portugal.

葡萄牙人教我如何做葡式蛋挞。

The ___Portuguese taught me how to make custard tarts.

我正在学习葡萄牙语，因为明年要去里斯本旅行。

I'm learning ___Portuguese because I'm traveling to Lisbon next year.