我喜欢披萨，但我只是偶尔吃一次。

I enjoy pizza, but I only have it ___now ___and ___then.

如果你偶尔想吃点甜食，可以试试加蜂蜜的酸奶。

If you crave a dessert ___now ___and ___then, try having some yogurt with honey.

他偶尔会翻看自己的旧相册。

He checks his old photo albums ___now ___and ___then.