✔ 最佳答案
this is called knock knock joke...it is a traditional joke in engkand. for example:
people A: knock knock
people B: who is there?
people A: ice-cream
people B: ice-cream who?
people A: ice-cream (i scream) everytime whEN I see a ghost!!
or another example:
people A:knock knock
people B: who is there?
people A: icy
people B: icy who?
people A: icy (i see ) your sister in supermarket!!
get it? sooo easy=]