He must be happy!

He must be happy! I must be happy. must be happy must be young must be beautiful You must be happy oh., You must certainly be happy It must be very happy. he must ( )here.《be》 英语翻译Dear sister ,you must be happy!must!must! You must be happy翻译中文 SO DO I,YOU MUST BE HAPPY what i care,must be happy,please! We must,probably be happy well,forever We must be happy,however we Friends,you must be better than me happy,happy yo Father must be happy about the painting you showed him.He n___________ with a smileFather must be happy about the painting you showed him.He n___________ with a smile.是不是never?还是什么? Do you think a person who always smiles,so he must be happy?Why?Please answer the question in English. He seem to be very happy改写 i am sure he---- (be) happy soon