5 sentences

1. 政府计划扩建这个港区。

   zhèng​fǔ jì​huà kuò​jiàn zhè gè gǎng​qū.

   The government plans to expand this port area.

   Source: Dong Chinese Dictionary

2. 由于游客增加，这个机场正在进行扩建。

   yóu​yú yóu​kè zēng​jiā, zhè​ge jī​chǎng zhèng​zài jìn​xíng kuò​jiàn.

   The airport is undergoing expansion due to the increase in tourists.

   Source: Dong Chinese Dictionary

3. 政府将这块土地划拨给学校进行扩建。

   zhèng​fǔ jiāng zhè kuài tǔ​dì huà​bō gěi xué​xiào jìn​xíng kuò​jiàn.

   The government allocated this land to the school for expansion.

   Source: Dong Chinese Dictionary

4. 为了扩建马路，这些老房子必须被拆除。

   wèi​le kuò​jiàn mǎ​lù, zhè​xiē lǎo fáng​zi bì​xū bèi chāi​chú.

   To widen the road, these old houses must be demolished.

   Source: Dong Chinese Dictionary

5. 由于校舍扩建，该校今年决定增收两个班的学生。

   yóu​yú xiào​shè kuò​jiàn, gāi xiào jīn​nián jué​dìng zēng​shōu liǎng gè bān de xué​sheng.

   Due to the expansion of school buildings, the school decided to admit two more classes of students this year.

   Source: Dong Chinese Dictionary