题目

根据短文内容，从方框中选择恰当的单词完成句子。部分单词在填入前需进行词形转换，每个单词只能用一次，每空只能填一词。 go； large； earth； billion； that The is a planet and it around the sun. Seven other planetsalso go around the sun. None of them has an environment like of the earth, so scientists do notthink they will find life on them. The sun and its planets are called the solarsystem, and our solar system is a small part of a group of stars and planets, called theGalaxy or the Milky Way. There are of stars in the Galaxy, 把桃子搬回家．（连一连）