他在演讲期间讲了个笑话来活跃气氛。

He lightened the mood by ___cracking ___a ___joke during the speech.

我们计划在演示开始时讲个笑话来吸引观众。

We plan to ___crack ___a ___joke at the start of the presentation to engage the audience.

喜剧演员经常讲关于日常生活的笑话。

It's common for comedians to ___crack ___a ___joke about everyday life.