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.

一个月前，我看了一个关于在日本附近被捕捞的鲸鱼的节目。

One month ago, I saw a programme about a ___whale that was fished near Japan.