3 sentences

1. 蒙恬是秦朝的名将。

   Méng tián shì Qín​cháo de míng​jiàng.

   Meng Tian was a famous general of the Qin Dynasty.

   Source: Dong Chinese Dictionary

2. 焚书坑儒是秦朝著名的历史事件。

   fén​shū kēng rú shì Qín​cháo zhù​míng de lì​shǐ shì​jiàn.

   The burning of books and burying of scholars was a famous historical event in the Qin Dynasty.

   Source: Dong Chinese Dictionary

3. 咸阳在秦朝时期曾是一座规模宏伟的大都。

   Xián​yáng zài Qín​cháo shí​qī céng shì yī zuò guī​mó hóng​wěi de dà​dū.

   Xianyang was a magnificent metropolis during the Qin Dynasty.

   Source: Dong Chinese Dictionary