He used to be devoted to his teaching when he was young;

He used to () his teaching when he was young;a devote tob; be devoted toc;devoting tod;being devoted to he used to( devote himself to work) hard.这种说法好像不对?只能he used to be devoted to working har When he was young,he used to_hard at his lessons. A.devote to working B.devote himself to work C.be devoted to work D.be devoted to working 求权威解答,不肯定的别瞎掺和. He wants to be a scientist and [devote] himself to science 为什么devote要用原形? He used to be short. He used to be weak. when he was young,he used to_hard at his lessonAdevote to working B devote himself to work C be devoted to wok D be devoted to woking为什么B不对? Used he to be short?回答是Yes,he used.还是Yes,he used to. he used to be short hair对吗 he is not what he used to be 为什么不能how he used to be Used he to be short?回答是Yes,he used.还是Yes,he used to.还是Yes,he used to be. give up,devote to,make a contribution to,be used to,pay attention to都有后面跟介词的用法吗? 翻译：He is no longer what he used to be. He is what he used to be.是什么意思? he is no longer what he used to be He used to be short .He used to be short.(对short提问）_____ _____he use to be _____? Tom didn't used to be quiet,he used to be o____. devote to 和be devote to是不是用法都一样的,都是to doing sth?