earth the what should do we save to 连词成句

what on the earth? what is the shape of the earth? What is the biggest animal on earth? what do friends of the earth What is a Friend of the Earth? what are friends of the earth What do you think of the earth what are the smallest birds on earth what is the biggest animal on the earth 1、We live _____.What ______ are we doing with it?A、 on earth,on earch B、on the earth,on the earthC、on earth,on the earth D、on the earth,on earth what is the friends of the earth?what is the environment?what do friends of the earth do?what do people do?(look after the enwironment) what is the earth like today 什么意思 What is the life expectancy of Earth?求翻译 What should we do to save the earth?是什么时态 what travels around the earth without using any fuel? What travels around the earth without rockets?帮忙分析句子成分! What can I do for the earth (翻译为中文) what can go around the earth without rocket谜是什么