If we ____ now to protect the environment,we’ll live to regret it.A.hadn’t acted B.haIf we ____ now to protect the environment,we’ll live to regret it.A.hadn’t acted B.haven’t acted C.don’t act D.won’t act从句与现在事实相反...

It____(rain) hard now.We have to ____(stay) If we ____ now to protect the environment,we’ll live to regret it.A.hadn’t acted B.haIf we ____ now to protect the environment,we’ll live to regret it.A.hadn’t acted B.haven’t acted C.don’t act D.won’t act从句与现在事实相反... For an arbitrary natural number n,we add 121to it when it is an odd number and have it divided by 2(接上）when it is an even number.This is one operation.Now if we perform this operation on 231 successively,whether 100 can appear or not in this pr 同义句转换：1.He was a teacher in the past,but now he isn't.He___ ____ ____ a teacher.2.It seemed that she has changed a lot.She seemed to___ ___ a lot.3.He's been singing for five years.He began to sing___ ___ _____4.Unless we deal with our pr If we want to keep healthy,we should tke pr in___sports ____running,swimming and skating.A as,such B such,as C such.like D like,such We need to get enough ____ (train) if we want to take part in the competition. 英语虚拟语气 If we ____(not win) that contract we tendered for last month,we ____(probably be) out of job now. if we were to build such a wall now.句中的 were to build 是什么语法 “If we go back to past and keep the memories now“If we go back to past and keep the memories now,will we choose the way we are standing and crying now”求人翻译成中文, The kids ____(not)go to school now if it is raining too hard tomorrow. the work ____(it) is easy.but we have no time to do it now. It ie 7:30 now.We should go to school.(合并句子） It is ____ ____ ____ ____ go to school. 改错 1.Yesterday Jack arrived to Beijing.____ 2.Must we clean the room now?No,you mustn't.____ Mum,can we ____(play) football now? We should ____ umbrellas with us when we are going to the movies.It is raining now. We can not ____ if the earth will come to an end in 2012. If they ____(be)older we __(may ask)them to do it. If ____ to bring our tennis packets,so we couldn't play tennis.