escalate|escalated|escalating

贸易争端可能会迅速升级为全面经济战。

The trade dispute could ___escalate into a full-scale economic war.

抗议活动迅速升级为暴力冲突。

The protest quickly ___escalated into violent clashes.

两国之间的紧张局势正在升级。

The tension between the two countries is ___escalating.