We now know the first dinosaurs ___ [apper]about 230 million

We now know the first dinosaurs ___ [apper]about 230 million We now know the first dinosaurs_____(出现)about 230 million ye 关于一些语法问题1.we know that the first dinosaurs appeared about 12 英语翻译1.dinosaurs first appeared about 230 million years ago 2 we all know that the first diosaurs a____ about 230 milliony Exactly when the first people arrived in what we now know as The ___(world,world's)population is about 1700 million. we ___(not know) the result of the find exam by now We now know that about ________ all the kinds of seaweed are 单项选择.We all know that the dinosaurs were all _____. we can learn about the lives of dinosaurs from fossils of th 英语翻译I know ___ ___ ___ you about the concert