3 sentences

1. 演员已经画好妆，准备登场。

   yǎn​yuán yǐ​jīng huà hǎo zhuāng, zhǔn​bèi dēng​chǎng.

   The actors are made up and ready to go on stage.

   Source: Dong Chinese Dictionary

2. 下周，这款全新的智能手机将正式登场。

   xià zhōu, zhè kuǎn quán​xīn de zhì​néng shǒu​jī jiāng zhèng​shì dēng​chǎng.

   This brand-new smartphone will make its official debut next week.

   Source: Dong Chinese Dictionary

3. 就在这个关键时刻，一个神秘人物登场了。

   jiù zài zhè gè guān​jiàn shí​kè, yī gè shén​mì rén​wù dēng​chǎng le.

   At this critical moment, a mysterious figure appeared on the scene.

   Source: Dong Chinese Dictionary