⑴____ A.book B.good C.look D.school
⑵____ A.student B.Tuesday C.June D.useful
⑶____ A.bread B.speak C.teacher D.eat
⑷____ A.orange B.geography C.big D.vegetable
⑸____ A.thank B.that C.brother D.those
两栖类是脊椎动物由____ 向____ 过度的类群,____ 类动物由于能在陆地上生活和生殖而成为真正的陆生动物.