题目内容：

办公室里的人都在忙于工作
People in the office ____ all ____ _____ work.
are busy at
但是词组不是be busy with么?

优质解答

These are very similar phrases,but they do not have the same connotation.Busy with somewhat implies that you are engaged in a constructive or fun activity:I'm busy with teachingI'm busy with raising c...