make it one's business to (do something)
считать своим кровным делом, своей обязанностью
I made it my business to take care of my sister's children.
Другие идиомы:
- make as if (to do something)
- make a big deal about (something)
- make over (something)
- make an exception (for someone)
- make sense out of (someone or something)
- make a beeline for (someone or something)
- make a cold call
- make waves
- make a bed
- make light of (something)
- make no difference to (someone)
- make hay while the sun shines
- make an all-out effort
- make oneself heard
- make a scene