We (have been going) over maths these days.括号中的是什么用法为什么要这样用

Of course we hope everything to ___ smoothly.A,be going B,have been goingA,be going B,have been going C,going D,have been gone We have been ```` have been going 顺便造一句 we have been going out ever since.怎么翻译啊,请具体解释下. We (have been going) over maths these days.括号中的是什么用法为什么要这样用 We would have been very We have been moving fomward! hi 我想问两个句子 we are going extinction computers have been geetting practivewe are going extinctioncomputers have been geetting practive都是系动词 为什么后面跟的不一样啊?一个是名词 一个是形容词 教育/科学 -> 外语学习 -> I __ the USA for about two yearsA.have been to B.have gone to C.have been in D.have been-We are going to have a four-day holiday-____ go to Hangzhou for holiday.A.How about B.What about C.Shall we D.How do we Where are we going to have it? We're going to have lunch togther? 英语翻译Have we been best friends yet? we have been flighting all your Fuijhbbbhh and then we have been I/we should have been working.是什么意思 We have been always in love. We have been used to it sadly we would have been very good