学进去

Whales ___________“Jingyu” in Chinese. But they are not fish. They ___________ in the ocean. They can swim in deep water, and they can breathe the air, too. Whales are huge animals. ___________ of them are about twenty to thirty meters long and over one hundred and fifty tons in weight. The ___________ lovely whales are the white whales. They are clever, and they are very kind to people. Whales are our friends. We should be ___________ to them.