bring excitement into our lives， and open up new possibilities ____ That means we end up inside our own little bubbles， no longer；2与老师端紧密互动，在线完成老师作业 3错题本功能，做错题目随时归纳总结 4在线单词测试单词背诵功能，零碎时间快。

“教师端”“教师助手”“学生端”APP2找到公众号中的下载地址。

m a little busy in the morning How about tomorrow afternoon？W make a difference in their lives A few days ago， great floods；2017·北京，31The little problems _________ we meet in our daily lives may be inspirations for great inventions12 2017·天津。