we know that we are on a planet-------among other planets ar

we know that we are on a planet-------among other planets ar We don't know if there are any________things on other planet We haven't found life on other planets yet We haven't found life on other planets yet.We haven't found ;will;all;on;planets;inthefuture;we;live;other怎样连词成句? we are the good friends.we know each other since the stone a Is there life on Mars(火星)?We do not know.We are sure that ea We haven"t found life on other （planet）(行星）yet 介样做对么 we know each other Earth is the only planet we know of that has life. we all know that wild animals are our friends.We need then a There are many things we need to know that we do not learn a