3 sentences

1. 杜甫是唐代著名的诗人。

   Dù fǔ shì Táng​dài zhù​míng de shī​rén.

   Du Fu is a famous poet of the Tang Dynasty.

   Source: Dong Chinese Dictionary

2. 杜这种果树在北方地区比较多见。

   dù zhè zhǒng guǒ​shù zài běi​fāng dì​qū bǐ​jiào duō jiàn.

   This kind of birchleaf pear tree is common in northern regions.

   Source: Dong Chinese Dictionary

3. 我们应当建立健全管理制度，从源头上杜绝浪费现象。

   wǒ​men yīng​dāng jiàn​lì jiàn​quán guǎn​lǐ zhì​dù, cóng yuán​tóu shàng dù jué làng​fèi xiàn​xiàng.

   We should establish a sound management system to eliminate waste at its source.

   Source: Dong Chinese Dictionary