蓝鲸是世界上最大的动物。

The blue ___whale is the largest animal in the world.

我们在书上看到一张鲸鱼的图片。

We saw a picture of a ___whale in the book.

你可以去巴塔哥尼亚钓鲑鱼，也可以观鲸。

You can go to Patagonia to fish for salmon and see a ___whale.