if you refuse his invitation,he will be unhappy为什么填invitatio

if you refuse his invitation,he will be unhappy为什么填invitatio ____(accpet) his invitation,or he will be unhappy. If you show your unhappy face,he will be unhappy,___.A.eithe If you are unhappy,I will be unhappy.（中文） if you _____ too late,the host will be unhappy.空格里填什么 your teacher will be unhappy if you come to school late.为什么用 If you refuse to accept the invitation,______. If you are unhappy,I will be unhappy中文什么意思? he will make his teacher unhappy you refuse he will reproduce it My mother will be unhappy ） if you bring your sister to the if Alan doesn't change his mind ,he will be