Welcome back at school.这句话错在哪里今天就要!求求各位哥哥姐姐们啦

Welcome Welcome Welcome back Welcome back at school!那里错了? Welcome back! welcome back, welcome back at home语法错了吗 back home还是back at homewelcome come back home对还是welcome back at home 哪个正确？ 英文翻译,welcome back. welcome back 怎么读 Welcome back to school. welcome back中文 Welcome back Queen welcome back这个是什么意思? welcome back to schoo 怎么回答welcome back? Welcome back toschool. welcome back to 英译汉:Welcome Back Kotter Welcome to back改错