Definition: someone whose job is to watch or check something Level: B2
老师选她当班长。
The teacher chose her as the class ___monitor.
一名联合国监督员获准进入冲突区域。
A United Nations ___monitor was allowed to enter the conflict zone.
他担任独立监督员以确保选举公正。
He served as an independent ___monitor to ensure the election was fair.
