】根据文章内容“And when spring comes, they are big enough to go up to trees for fun!”Р 可知答案为 spring。Р Ⅶ.书面表达(15)Р 【参考范文】Р Amazing thingsР Elephants are not the biggest animals in the world. The world’s biggest animals are in the seaР —but not fish. They lived on the Earth a long time ago. They’re usually 30 meters long and 1, 000Р kilos heavy. They’re one of the cleverest animals in the world. They can talk to each other, butР people don’t know what they are saying. What are they? They’re blue whales.Р 15