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He is very busy ___his papers ,He is far too busy to callers.前一个是用writing 还是 write?求详解

分类: 作业答案 • 2021-12-20 07:24:53

问题描述：

He is very busy ___his papers ,He is far too busy to callers.前一个是用writing 还是 write?求详解

答

Writing Be busy doing 意思是忙于做某事