同义句 She is busy with her homework.She is ____ ____ her homework.

问题描述:

同义句 She is busy with her homework.She is ____ ____ her homework.
She is busy with her homework.
She is ____ ____ her homework.

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正确答案是:
She is busy with her homework.  
= She is 【busy】【doing】 her homework.
她忙着做家庭作业.
【解析】:
be busy with sth = be busy doing sth 忙于.