泰坦尼克号是一艘在1912年沉入海底的客轮。

The Titanic was a passenger ship which ___sank to the bottom of the ocean in 1912.

船里进水了，开始下沉。

The boat filled with water and began to ___sink.

花园椅的腿陷入了松软的地面。

The legs of the garden chair ___sank into the soft ground.