it remains unknown & it's remains to be seen 有什么区别,

it remains unknown & it's remains to be seen 有什么区别, 主语从句Which should be chosen remains unknown.可否改为It remains unknown which should be chosen. Whether we will go for an outing tomorrow remains unknown. ＿＿ caused the accident remains unknown.（填连词） the owner of the book remains unknown是什么意思 there remains 和 it remains的区别 There it remains. 一个英语语法问题：whether能否用来引导定语从句?谢谢如：The problem whether it will rain tomorrow remains unknown.若whether不能引导定语从句,则上句应作如何修改? unknown When the president will carry out the plan remains unknown to the public.翻译 在线等 ____the piane will arrive on schedule remains unknown. A.if Bthat Cwhether Dwhen求解、为什么 What caused the accident remains unknown.引导词做了什么成分 it remains to sb to do 1.we'd better take the umbrella--i'm sure it (C)when we arrive london:it's always wet there at this time of year A.will rain B.is raining C.will be raining D.would rain为什么不选A2.It remains unknown（A)the peace talk between the two countries 英语翻译是it remains的用法呀，用it remains造几个句子， 用 it 改写下列句子1.Who should be the next manager of the football team was still a question 2.The young man was made manager of the team,which surprised everyone 3.Whether the young man can manager the team successfully remains unknown 4.Howe Whether we will go for an outing tomorrow remains unknown.我能不能首先把该句简化看做wether remains unknow.然后再让wether做状语,添加he will go for an outing tomm.这种看法对吗?求指教. The reason why he was chosen remains unknown why在从句中是做宾语吗网上写的是这句话是定语从句