他讲的笑话太滑稽了，我们都忍不住大声'哈'了出来。

His joke was so funny that we all couldn't help but let out a loud ___ha!

听到这个荒谬的建议，他不屑地发出一声嘲笑。

When he heard the ridiculous suggestion, he let out a mocking ___ha.