回复：Happy new year to you 是用So do you 还是 so do why?

回复：Happy new year to you 是用So do you 还是 so do why? -Why do you look so happy? -why do you feel so happy why do you look so happy?是一般现在时吗? Why do you want to forget this so hard,want to be happy so d 'Why do you think so?' Why do you think so? why do you say so? Why do you look so happy?Much to my______,I passed the tesy. why do you do go to bed so early today why do you make me do so What do you think ( )you so happy?