污染水平被密切监测。

Pollution levels are ___closely monitored.

如果你仔细看，你能看到他涂掉了签名的地方。

If you look ___closely, you can see where he painted over his signature.

我认为，如果公司决定仔细审视其员工和旅行者的条件，为High Travel担任口译员将是一次很棒的经历。

I think that working for High Travel as its interpreter would be a great experience if the company decides to look ___closely at the conditions of its employees and travelers.