Question

When he was young,he used to_hard at his lessons.

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。

Answer 1

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

Answer 2

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。

Answer 3

B