He is busy.He keeps ---- these days. A work B to work C work

问题描述:

He is busy.He keeps ____ these days. A work B to work C works D working 要理由.
1个回答 分类:英语 2014-11-19

问题解答:

我来补答
D
固定短语:keep doing sth
句意是:他很忙.这些日子他一直在工作.
 
 
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