他正式宣布放弃对家族财产的所有权。

He officially ___renounces his ownership of the family property.

他公开宣布放弃王位继承权。

He publicly ___renounced his claim to the throne.

他决定戒掉每天喝汽水的习惯。

He decided to ___renounce his daily soda habit.