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work on与be busy with
题目内容：
work on与be busy with优质解答
work on
1.致力于,从事于：
The scientists are still working on inventing new methods of reaching outer space.
2.继续工作,不断工作：
The director worked on in the office until ten o'clock last night.
be busy with是忙于做……
He pretended to be busy with some work.
他假装忙着什么事.
work on与be busy with
优质解答
work on
1.致力于,从事于：
The scientists are still working on inventing new methods of reaching outer space.
2.继续工作,不断工作：
The director worked on in the office until ten o'clock last night.
be busy with是忙于做……
He pretended to be busy with some work.
他假装忙着什么事.
1.致力于,从事于：
The scientists are still working on inventing new methods of reaching outer space.
2.继续工作,不断工作：
The director worked on in the office until ten o'clock last night.
be busy with是忙于做……
He pretended to be busy with some work.
他假装忙着什么事.
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