为下列句子排序,组成一段完整通顺的对话。
(____)A.Look!It's in the box.
(____)B.Is it under the chair?
(____)C.Where is my cat?
(____)D.Thank you very much.
(____)E.No,it isn't.
在生物圈中,人属于( )
1979年,我国所取得的重大外交成就是( )