她签署了一份文件，正式宣布放弃继承权。

She signed a document ___renouncing her inheritance rights.

这位前吸烟者在演讲中公开宣布戒除吸烟习惯。

The former smoker gave a speech ___renouncing his habit of smoking.

她签署了文件，正式放弃英国国籍。

She signed the documents officially ___renouncing her British citizenship.