3 sentences

1. 大家鱼贯而入，进场就座。

   dà​jiā yú​guàn ér rù, jìn​chǎng jiù​zuò.

   Everyone entered in single file and took their seats.

   Source: Dong Chinese Dictionary

2. 领导们在主席台上就座。

   lǐng​dǎo men zài zhǔ​xí​tái shàng jiù​zuò.

   The leaders took their seats on the rostrum.

   Source: Dong Chinese Dictionary

3. 请各位来宾在自己的位置上就座。

   qǐng gè​wèi lái​bīn zài zì​jǐ de wèi​zhi shàng jiù​zuò.

   Would all guests please take their seats.

   Source: Dong Chinese Dictionary