问题
选择题
Hi, Jean! You look unhappy. _________?
A．What did you happen
B．What you happened
C．Did you happen
D．What happened to you
答案
D
题目分析: 句意：你好，琼！你看上去很开心，发生什么事了？happen发生，happen to sb某人发生某事；根据语境可知问发生什么事了，特殊疑问句，故选D.