This serious problem have been take into account by our governmental departments and the public.改错,有几个错误?

this problem may lead to more serious onesthis problem may lead to more serious ones if ( )unsolved, remain/keep increasing serious problem,air This is very serious problem什么意思知道的说下 谢谢 people don't realize how _________(serious/seriously)this problem has actually been More and more people have realized that how serious this problem is.这个句子中that为什么要删掉? Water shortage in this area will be a serious problem to the people,_much has been done. This problem may lead to more serious ones if_______ unsolved.A.remained B.left 选什么 根据是什么? This problem may lead to more serious ones if left unsolved.if left unsolve 应该怎么理解. this problem may lead to more serious ones if ——unsolved A.makingB.leftC.remainedD.keeping为什么 people don't realize how _________(serious/seriously)this problem has actually been用形容词还是副词 This serious problem have been take into account by our governmental departments and the public.改错,有几个错误? _____health professionals do believe Internet addiction is a serious problem,they may not know how to treat this problem.A.UntilB.WhenC.As ifD.Even though正确答案是： There occured a serious problem.改错 this problem may lead to more serious ones if () unsolveda.remained b.remainninglack 的用法 及物和不及物不及物动词时不是没有被动态啊 ----Hi,Jone.What are you going to do this Sunday?----_______.Do you have any ideas?A.Nothing serious B.Nothing much C.No problem D.Thank you 高二英语选择题,请解释This problem may lead to more serious ones if ______ unsolvedA.remainedB.left为什么答案是B而不是A,A为什么不行? what is the most serious problem facing the world?why?how can this be fixed以此为主题写一篇演讲稿！2-3分钟 What can be done to stop drug trafficking?Drug damage lots of people and become a serious social problem,we mustn't neglect this issue.