If there were life on Mars,such life forms_______unable to s

If there were life on Mars,such life forms_______unable to s There _____sign of life on Mars. NOVA IS THERE LIFE ON MARS怎么样 We haven't known ____ there is life on Mars.A.that B.if C.wh there is now considered to be no life on the Mars Could there be life on Mars?　　按首字母填空 ＿＿＿there be life on Mars? 英语作文life on Mars They believe there has been life on Mars,has'nt there?这个反意问句 求一篇英语作文 Life on Mars Most scientists believe that there is no life on Mars as c__ Is there life on Mars(火星)?We do not know.We are sure that ea