vivian0415
A: what is the highest mountain in the world?B it's qomolangmaA: Have you ever heard of it?B: Yes, I have heard of it since I was ten years old.A: How high it is?B: It's 8844.43 meters.A: What is the deepest sea in the world?B:The Caspian Sea is the deepesr of all the salt lakes in the wirld(后面省略了）A：So, what can we do for them?B: we can protect them form rubbish, dirty water and so on.
