2014春季英语人教版新课标选修7u3 section ⅲ跟踪检测及答案 unit 3 section ⅲ 课时跟踪检测
高考练习 dolphins are not fish, but warm-blooded animals. they live in groups, and speak to each other in their own language. in this way they are like other animals, such as bees and birds. but dolphins are very different from almost all land animals. their brains are nearly the same size as our own, and they live a long time—at least twenty or thirty years. like some animals, dolp
