我们大家都凑钱给老师买了一份礼物。

We all ___chipped ___in to buy our teacher a present.

如果你说你来付钱，他们会主动提出凑份子，你总是可以礼貌地说："当然，为什么不呢。"

If you say it's on you, they will offer to ___chip ___in, and you can always say politely: "Sure, why not."

大家都为办公室派对凑了钱。

Everyone ___chipped ___in for the office party.