free ·verb
Definition: to allow someone to leave a prison or place where they have been kept Level: B2
在与绑匪谈判后，警察释放了人质。
The police ___freed the hostages after negotiating with the kidnappers.
当新证据证明他们的清白时，这些无辜的囚犯终于被释放了。
The innocent prisoners were finally ___freed when new evidence proved their innocence.
这个人道主义组织不懈努力，以释放政治犯。
The humanitarian organization worked tirelessly to ___free the political prisoners.