侦探最终揭露了骗子的真实身份。

The detective finally ___unmasked the true identity of the fraudster.

医生在进入手术室前摘下了口罩。

The doctor ___removed his mask before entering the operating room.

医生给病人做完检查后，摘下了口罩。

The doctor ___unmasked after finishing the examination of the patient.

安全专家最终揭露了隐藏在系统深处的恶意软件。

The security expert finally ___unmasked the malware hidden deep in the system.