Ifyouwatchtheskyf的精选

问题详情：根据短文内容，从A、B、C、D四个选项中选出一个能填入相应空格内的最佳*。Ifyouwatchtheskyforaboutanhourafterthesungoesdown,youmayseesome“movingstars”.Butthey’renotrealstars.They’reman-madesatell...