3 sentences

1. 庄稼一枝花，全靠粪当家。

   zhuāng​jia yī zhī huā, quán kào fèn dāng​jiā.

   A crop is like a flower; it all depends on the manure.

   Source: Dong Chinese Dictionary

2. 他年纪虽小，却已经开始当家了。

   tā nián​jì suī xiǎo, què yǐ​jīng kāi​shǐ dāng​jiā le.

   Despite his young age, he has already started managing the household.

   Source: Dong Chinese Dictionary

3. 在这个公司里，到底是哪位领导当家？

   zài zhè​ge gōng​sī lǐ, dào​dǐ shì nǎ wèi lǐng​dǎo dāng​jiā?

   Which leader is actually in charge of this company?

   Source: Dong Chinese Dictionary