这些房子维护得很好。

These houses are very well ___maintained.

这辆车保养得很好。

This car is very well ___maintained.

他多年来一直保持着良好的工作习惯。

He has ___maintained good work habits for many years.

她坚持认为这个决定对公司最有利。

She ___maintained that this decision was best for the company.

他努力工作来维持家人的生活。

He works hard to ___maintain his family's living expenses.