她假装忘记了我的生日，其实是想给我一个惊喜。

She ___fooled me by pretending to forget my birthday, but it was just a surprise.

孩子们在操场上嬉闹玩耍。

The kids were ___fooling around on the playground.

我以为今天是周末，结果被日历骗了。

I thought it was the weekend, but the calendar ___fooled me.