We (have been going) over maths these days.括号中的是什么用法

We (have been going) over maths these days.括号中的是什么用法 ____lovely weather we have been having these days! We have been cleaning the house these days. 英语翻译What lovely weather we have been having these days! We have been (cleaning the house) these days.(就括号部分提问) ————— We stay at home days中的days是什么用法? where have you been all these days? How have things been these days? all these last few days,we have been busy fighting drought. （B ）lovely weather we have been having these days!B对吗 A.How These days we have been looking forward to _____ to visit yo we are going over to 中的over何解?固定用法?