l've never heard such a ______ (humour) story before.

l've never heard such a ______ (humour) story before.
l've never heard such a ______ (humour) story before.

l've never heard such a ______ (humour) story before.
humorous

加er

humourous

l've never heard such a ____humourous__ (humour) story before

humorous ，应该填写它的形容词形式幽默的