4 sentences

1. 他在读大学预备课程。

   tā zài dú dà​xué yù​bèi kè​chéng.

   He is taking university preparatory courses.

   Source: Dong Chinese Dictionary

2. 裁判员喊道：“各就各位，预备，跑！”

   cái​pàn​yuán hǎn​dào:“ gè​jiù​gè​wèi, yù​bèi, pǎo!”

   The referee shouted, 'On your marks, get set, go!'

   Source: Dong Chinese Dictionary

3. 大家请预备好，比赛马上就要开始了。

   dà​jiā qǐng yù​bèi hǎo, bǐ​sài mǎ​shàng jiù yào kāi​shǐ le.

   Everyone please get ready, the competition is about to start.

   Source: Dong Chinese Dictionary

4. 运动员在起跳前进行了几次预备弹跳。

   yùn​dòng​yuán zài qǐ​tiào qián jìn​xíng le jǐ cì yù​bèi tán​tiào.

   The athlete did a few preparatory hops before the jump.

   Source: Dong Chinese Dictionary