延伸与提升 根据短文内容及所给首字母提示，补全文中所缺单词，使短文 完整、通顺。 I have three good friends.They're Jerry,Dave and Bill. Jerry is an Asian boy.Dave is an African boy.Bill is a European boy.When I first met them,they were very young. Now they've grown up and have changed a lot.Here's the 1.general introduction to their changes. 导航页导航页 延伸与提升 根据短文内容及所给首字母提示,补全文中所缺单词,使短文 完整、通顺。 I have three good friends. They’re Jerry, Dave and Bill. Jerry is an Asian boy. Dave is an African boy. Bill is a European boy. When I first met them, they were very young. Now they’ve grown up and have changed a lot. Here’s the 1. g__________ introduction to their changes. eneral