他的演讲释放了观众压抑已久的热情。

His speech ___unleashed the audience's long-suppressed enthusiasm.

他的演讲引发了观众压抑已久的愤怒情绪。

His speech ended up ___unleashing the audience's long-suppressed anger.

新的政策释放了企业的创新活力。

The new policy ___unleashed the creative potential of businesses.