6 sentences

1. 二、四、六是双，一、三、五是单。

   èr, sì, liù shì shuāng, yī, sān, wǔ shì dān.

   Two, four, and six are even numbers; one, three, and five are odd numbers.

   Source: Dong Chinese Dictionary

2. 这个数字是单的，那个数字是双的。

   zhè​ge shù​zì shì dān de, nà​ge shù​zì shì shuāng de.

   This number is odd, and that one is even.

   Source: Dong Chinese Dictionary

3. 我一生中，从没想过能看到你单膝下跪。

   wǒ yī​shēng zhōng, cóng méi xiǎng guo néng kàn​dào nǐ dān xī xià​guì.

   In all my life, I never thought I'd see you down on one knee.

   Source: OpenSubtitles

4. 单先生是我们的新老师。

   Shàn xiān​sheng shì wǒ​men de xīn lǎo​shī.

   Mr. Shan is our new teacher.

   Source: Dong Chinese Dictionary

5. 请核对一下名单上的姓名。

   qǐng hé​duì yī​xià míng dān shàng de xìng​míng.

   Please check the names on the list.

   Source: Dong Chinese Dictionary

6. 单看外表，你很难猜出他的职业。

   dān kàn wài​biǎo, nǐ hěn nán cāi​chū tā de zhí​yè.

   Judging by appearance alone, it's hard to guess his profession.

   Source: Dong Chinese Dictionary