why do you look so blue?急

Why do you look so upset -----Sally,why do you look so unhappy? -Why do you look so happy? -why do you always look so tired? Why do you look so angry? -Why do you look sad?-There are so many problems____. 一个英语语法问题 why do you look so unhappy? why do you look so happy?是一般现在时吗? why do you look like? why do you look so upset?there are so many problems___a.rema -Why do you look so tired?-There are so many problems___ why do you look so tried I didn't do to sleep( )12.00p.m.las