Why is "U" the happiest letter

why is U the jolliest letter? Why is U the happiest letter Why is U the jolliest letter?jolliest(最开心） .Why is U the jolliest (最快乐) letter Why is U the funniest letter?为什么U是最开心的字母 关于the question is 后面的句子应该是 why did u do that 还是 why u did that. 3、why is U the ijlliest letter?4、what letter is an animal?````` 脑筋急转弯: Why is U the jolliest letter?Thanks a lot! Why the answer is the reson.why..is English脑筋急转弯!Why are girls afraid of the letter Why is the letter E so important?What letter is an animal?What letter is a question?Why is U the jolliest letter?When do people have two mouths? why u always do the same thing? 英语脑筋急转弯:1、why are girls afraid of the letter 2、why is the letter E so important?都来猜猜啊!4、why is U the ijlliest letter?3、what letter is an animal? Why is the river rich? why the sky is blue? Why is the sky blue? what is the largest organs in the human bodies?Anybody know it?Plz tell methx so much:)why is instestine?will U plz give an explanation:) 一个英译中的问题1.Why are girls afraid of the letter 2.Why is the letter E so important?3.Why are the letter G and letter S in gloves close to each other?4.What letter is an animal?5.What letter is a question?6.why is U the jolliest letter?