It essential that everybody know what to do 为什么 know不加s

The essential features of something are those features that make it the thing that it is. I think it essential that...为什么不用 I think it is.. It was essential that we sing lease before the end of the month汉语怎么翻译? It is absolutely essential that 怎么看出是虚拟语气啊 It is essential that you ____on time.A.be B.are C .were D.being It is essential that everyone ___ what to do.A.knowB.knows为什么不是B呢? 64.你务必参加这个会议.（It is essential that…） It essential that everybody know what to do 为什么 know不加s AT shcool,it is essential that every child--equally regardless of family backgroundAtreatingBtreatedCbe treated Dis treated 求解答英语选择It's essential ___ everyone ______ what to do.为什么是that...know而不是that...knows essential essential essential essential essential essential 1.It was essential that the application forms ____________back before the deadline.A.must be sen1.It was essential that theapplication forms ____________back before the deadline.A.must besent B.would comeC.be sent D.were sent------------》我选择 It is essential that these application forms _____A.must be sentB.will be sentC.are sentD.be sent