3 sentences

1. 请把废纸扔进垃圾桶里。

   qǐng bǎ fèi​zhǐ rēng jìn lā​jī​tǒng lǐ.

   Please throw the waste paper into the trash can.

   Source: Dong Chinese Dictionary

2. 我们要养成回收废纸的好习惯。

   wǒ​men yào yǎng​chéng huí​shōu fèi​zhǐ de hǎo xí​guàn.

   We should develop the good habit of recycling waste paper.

   Source: Dong Chinese Dictionary

3. 他把信纸团起来，扔进了废纸篓里。

   tā bǎ xìn​zhǐ tuán qi​lai, rēng jìn le fèi​zhǐ lǒu lǐ.

   He crumpled up the letter and threw it into the wastebasket.

   Source: Dong Chinese Dictionary