描述月球和太阳系 — 英语填空题
题目
根据句意和中文提示，在空线上填入正确的单词，使句子完整通顺（每空一词）。The Earth is a planet and it goes around the ___（太阳）. The Moon is the Earth's satellite, and the Moon goes around the ___. There are eight planets in the solar s___, but there is only one star in it, and that is the ___.