Which of the following sentences is not a formal expression（）

Which of the following sentences is not a formal expression（）

A.How do you do!

B.Nice to meet you.

C.It is a great pleasure to meet you.

D.What’s up?

正确答案：D

★《布宫号》提醒您：民俗信仰仅供参考，请勿过度迷信！