如果再不还钱，他们威胁说要起诉我。

They ___threatened to sue me if I didn't repay the money soon.

不断上升的海平面威胁着沿海城市的安全。

The rising sea levels ___threaten the safety of coastal cities.

砍伐森林威胁着许多野生动物的生存。

Deforestation ___threatens the survival of many wild animals.