shàng / kè / líng / xiǎng / le / dà / jiā / lì / kè / tíng / zhǐ / xī / nào / huí / dào / zì / jǐ / de / zuò / wèi / shàng

上课铃响了，大家立刻停止嬉闹，回到自己的座位上。

When the class bell rang, everyone immediately stopped fooling around and returned to their seats.