threaten|threatened|threatens|threatening

他用枪威胁员工并要求给钱。

He ___threatened the staff with a gun and demanded money.

他威胁要向警察报告她。

He ___threatened to report her to the police.

其他人加入了我们，并开始用刀威胁我们。

The others joined us, and they began to ___threaten us with their knives.

不断升级的冲突正威胁着整个地区的稳定。

The escalating conflict ___threatens the stability of the entire region.

工业污染严重威胁着这条河流脆弱的生态系统。

Industrial pollution severely ___threatens the fragile ecosystem of the river.

如果不采取紧急行动，海平面上升将威胁全球许多沿海城市。

Rising sea levels will ___threaten many coastal cities worldwide without urgent action.

他的膝盖问题正威胁着他的自行车运动生涯。

His knee problem is ___threatening his cycling career.