仔细观察任何不寻常的事情。

___Keep ___your ___eyes ___open ___for anything unusual.

我们必须密切关注任何过度消费的迹象。

We must ___keep our ___eyes ___open ___for any excessive consumption.

警察被告知要密切关注可疑活动。

Police officers are told to ___keep their ___eyes ___open ___for suspicious activity.