他在超市买了一组四罐装的啤酒。

He bought a ___four-pack of beer at the supermarket.

我在超市买了一组四罐装的啤酒。

I bought a ___four-pack of beer at the supermarket.

他每天做仰卧起坐，现在能看到明显的四块腹肌了。

He does sit-ups every day and now has a noticeable ___four-pack.