他在市中心开了家小店，经营自己的生意。

He opened a small shop downtown to run his own ___business.

他在服装行业已经工作了十年。

He has been in the clothing ___biz for ten years.

我的感情生活是我的私事，不需要你操心。

My love life is my own ___business, so don't worry about it.