people have never ___ that before.人们以前没听说过那件事
问题描述：
people have never ___ that before.人们以前没听说过那件事
the children are playing happily ____.孩子们在船上开心的玩
the party ____ songs.晚会以唱歌结束了.
those monkeys are jumping _____.那些猴子一直再跳
答
People have never heard that before.
The children are playing happily on the boat.
The party ends with songs.
Those monkeys are jumping all the time.