3 sentences

1. 他在厨房里忙着整治一桌好菜。

   tā zài chú​fáng lǐ máng zhe zhěng​zhì yī zhuō hǎo cài.

   He is busy in the kitchen preparing a sumptuous meal.

   Source: Dong Chinese Dictionary

2. 他太嚣张了，非得好好整治他一下。

   tā tài xiāo​zhāng le, fēi​děi hǎo​hǎo zhěng​zhì tā yī​xià.

   He's too arrogant; we need to teach him a lesson.

   Source: Dong Chinese Dictionary

3. 政府决定整治这条污染严重的河流。

   zhèng​fǔ jué​dìng zhěng​zhì zhè tiáo wū​rǎn yán​zhòng de hé​liú.

   The government has decided to clean up this heavily polluted river.

   Source: Dong Chinese Dictionary