英语单项选择一题 What are busy __________ these days?

问题描述:

英语单项选择一题 What are busy __________ these days?
What are busy __________ these days?
A.do B.with C.doing D.to do

with,因为是be busy with sth,忙于做某事.
这句话解释为:这些天都忙些什么啊?