--------what about the protection?----Let's keep the surface

——what about protection -----Let' s keep the surface ___durt Water _________ about seventy persent of the earth,s surface Talk about the importance of environmental protection. there gases keep too much heat near the earth's surface what's the question about? About two thirds of the Earth's surface is covered by the se let's thank about the food. Let's talk about the picture,___? 开头let s talk about the man 英语翻译A Study on Disaster Management about the Protection of S How many school rules do you have? Let’s know about what the what's the meaning about the 'patio"?