The idea for the new machine came to Mr Baker _______ to his invention.

The idea for the new machine came to Mr Baker _______ to his invention.

题目
The idea for the new machine came to Mr Baker _______ to his invention.
A.while he was devoted B.while devoting C.while devoting himself D.while devoted
为什么选A 不选C ,
答案
妈呀,你没看到句子主语是IDEA吗?这种情况下怎么能用分词做状语
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