5 sentences

1. 秦老师是我们的班主任。

   Qín lǎo​shī shì wǒ​men de bān​zhǔ​rèn.

   Mr. Qin is our homeroom teacher.

   Source: Dong Chinese Dictionary

2. 秦岭是中国南北方的地理分界线。

   Qín lǐng shì Zhōng​guó nán​běi​fāng de dì​lǐ fēn​jiè​xiàn.

   The Qinling Mountains are the geographical divide between northern and southern China.

   Source: Dong Chinese Dictionary

3. 苏秦游说六国，主张合纵抗秦。

   Sū Qín yóu​shuì liù​guó, zhǔ​zhāng Hé Zòng kàng Qín.

   Su Qin lobbied the six states, advocating for a 'vertical alliance' to resist Qin.

   Source: Dong Chinese Dictionary

4. 他最近非常喜欢研究秦朝的历史。

   tā zuì​jìn fēi​cháng xǐ​huan yán​jiū Qín cháo de lì​shǐ.

   He has been very interested in studying the history of the Qin Dynasty lately.

   Source: Dong Chinese Dictionary

5. 秦腔是流传于西北地区的一种地方戏曲。

   Qín qiāng shì liú​chuán yú Xī​běi dì​qū de yī zhǒng dì​fāng xì​qǔ.

   Qinqiang is a type of local opera popular in Northwest China.

   Source: Dong Chinese Dictionary