题型：听力题 题类：常考题 难易度：普通
广西桂林市灌阳县2016-2017学年八年级下学期期中考试英语试卷
Is there life on other planets? There are seven other planets in our system, but of them has an environment like that of the . Spaceships from the earth have done surveys of the other planets, but they have not found any life there. Why has no one from other planets tried to with us? It is true that scientists have not discovered life on other planets in the yet, but some scientists believe that they will find it some day.
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