Why do we on earth? We will die? Our earth will burst?请翻译

Why do we on earth? We will die? Our earth will burst?请翻译 why should we call the earth we live怎样用英语回答？10~20字 原句是why should we call the earth we live on our mother earth Why you are always on the line? what on earth do you do?是什么意思? why don't we take a vacation on the earth?怎样翻译. why do we build castle on pillars of sand? why on earth would you want that What ( on earth)can we do to improve our environment.这一空能用after all 代替么? Why do you have so many significant lines on earth that are 23.5 degrees from some significant point? the environment on the earth is getting worse and worse.I agree with you.We must do everything we 请帮忙翻译一篇英语小短文吧（初二水平）,谢要完全人工翻译的Yhe Sound Do you know why we can hear the sound? Sounds we hear on the earth are carried by the air.since there is no air on the moon,people who go to the moon mus What on earth do you need? Who on earth do I love why do we study English why do we study English why should we do exercise? Why do we need friends? Why do we need friends? why do we need plants