他们已经决定成立一个帮助留守儿童的团体．
They have decided to a group to help the stay﹣at﹣home children．
明天的社会实践活动每个人都要准时参加．（on）
Everyone is supposed to be for the social practice tomorrow．
In his （演讲），he mentioned the Chinese Character Spelling Contest （汉字听写大赛） several times．
The decision to set up a No Homework Day every week is （欢迎）by all students．
The Silk Road is a （桥梁） for trade and culture exchange between China and other countries．
Online shopping saves a lot of time because people don't have to （等待）in line．