gallon|gallons

这个水壶可以装半加仑牛奶。

This jug can hold half a ___gallon of milk.

我每周要用掉大约两加仑牛奶。

I use about two ___gallons of milk every week.

她每次煮汤都会用掉好几加仑的水。

She uses ___gallons of water every time she makes soup.