Mars,it is the only planet whose surface can be seen from earth 中的from为什么不能用on,我是觉得都可以

1.It is said the gravity on Mars is only about ( ) of the gravity on earth.A.three-eighths B.third-eighth C.three-eightsD.third-eight It is the only It is the only. Mars,it is the only planet whose surface can be seen from earth 中的from为什么不能用on,我是觉得都可以 特殊句式the scientists know only when a great deal more information has been obtained,__ possible to plan a manned trip to Mars.A it will be B will it be C it is D is it lt's said that the gravity on Mars is only about It is said that the gravity on Mars is only about _______of the gravity on earthA three-eighths B.third -eighth C three -eights D third-eight 、并且为什么么、、谢谢了! 如何写evaluation啊.我看了一篇有关美国人写支持去火星探索的文章,我想反驳他.无奈不知道格式如The author Joulwan Melissa deems it’s essential for US to send a manned mission to Mars,Exploring to Mars is not only goo it is the only neet thing to Not very special,it is the only. Not very special it is the only It is only the fairy tale. [ ]is the cat?-----It's only one. is it only the jacket or pants what is the distance from the earth to the moom?what is it to mars?what is it to the nearest star? The baby is the only person that ___(survive) the air crash.答案填的是has survived.那填survived过去时不对吗,为什么要填完成时呢.It can _____(believe)that there is no life on Mars.为什么填be believed mars is not,it seems,the dry old planet we once believed it to be.为什么believe后面要用it to be?我选it错了. Mars is further from the sun than the