supervise

孩子们玩耍时，两名老师在监督。

The children play while two teachers ___supervise.

我的主要职责是在第一周监督新来的实习生。

My main responsibility was to ___supervise the new interns during their first week.

我们的主要活动将是在那些活动中监督 8 到 12 岁的孩子。

Our main activity will be to ___supervise the 8 to 12 year olds during those activities.