How about a surprise party for them?

给他们一个惊喜派对怎么样？

He is planning a surprise party.

他正在策划一次惊喜派对。

They orchestrated a surprise party.

他们精心策划了一场惊喜派对。

They are preparing a surprise party.

他们在准备一个惊喜派对。

She secretly planned a surprise party.

她秘密地计划了一场惊喜派对。

They planned a surprise party in secret.

他们暗中计划了一次惊喜派对。

A surprise party will definitely ple him.

一个惊喜派对肯定会使他高兴。

They planned a surprise party on the sly.

他们偷偷地计划了一次惊喜派对。

We planned a surprise party for her birthday.

我们计划好了一个惊喜派对来庆祝她的生日。

The expectancy of a surprise party excited her.

对惊喜派对的预期让她感到兴奋。