Tom was so busy----the answers from Pingping`s paper that he

问题描述：

Tom was so busy____the answers from Pingping`s paper that he forgot his name into his.
A.to copy;to change B.to copy;changing
c.copying;to change D.copying;changing
1个回答 分类：英语 2014-10-16

问题解答：

我来补答
C
be busy (in) doing sth. 其中in可以省略.
forgot to do 是指忘记去做某事
而forgot doing 是指忘记做过的某事.
 
 
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