each other

他们一直互相看着并微笑。

They kept looking at ___each ___other and smiling.

他们总是穿彼此的衣服。

They're always wearing ___each ___other's clothes.

你们为什么总是互相争吵？

Why are you always arguing with ___each ___other?

他们不停地相互看着对方并微笑。

They kept looking at ___each ___other and smiling.

我们可以每个月给彼此写一次信。

We can write to ___each ___other once a month.