许多家庭使用人造植物，因为维护成本低。

Many homes use ___artificial plants for low maintenance.

高尔夫球场有一个人造湖作为水障碍。

The golf course has an ___artificial lake as a water hazard.

一些饮料用人造香料增甜。

Some beverages are sweetened with ___artificial flavors.