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.

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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.
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.

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 used to devote himself to working hard
he used to be devoted to working hard
他过去常常很努力的工作
devote ... to 强调动作
be devoted to 强调状态
看样子是要选d啊

答案选D.be devoted to dong 意思是全心全意的,忠诚的,挚爱的,to是介词,不能直接加动词
意思是:当他年轻的时候,他过去常常全心全意的学习功课。

B