I work hard at schoo 和 At school Iwork hard

hard at work school I(? I work hard at school. school hard at work work hard at hard work hard on和work hard at 大侠..刚弄错了..是you are too busy at school和you work hard in schoo I work hard at school.So ____(do)my brother At work,I must work hard work hard at和work hard on 的区别 work hard in还是work hard at? 英语翻译In the new year,I will work hard in school.I will pay at You should work hard at school改成同义句：You _ _ _work hard at sc