初一年级 英语题：补全对话

初一年级 英语题：补全对话
A：Good morning,class. Today let’s （ ）about number ones in （ ） world . First ,（ ） is the tallest , do you know .B：It’s the giraffe. The giraffe reaches the highest .A：That’s right . Then which is the heaviest ?B：It’s the elephant. It is as （ ）as a high wall .A：You are right. The elephant is much bigger than any other animal . It is the heaviest （ ） the world.B：（ ）, sir . I’m afraid it’s a mistake . I （ ） before that the elephant is the heaviest animal on the land . But there is another heaviest animal （ ） the sea . It is far heaviest than the elephant. It is the whale, a huge fish .A：You are （ ）,（ ） the whale is not a fish . It’s a mammal.