为什么是It is imperative that this mission not fail.而不是It is imperative that this mission don't fail.

为什么是It is imperative that this mission not fail.而不是It is imperative that this mission don't fail. 英语It is imperative that this mission not fail为什么是It is imperative that this mission not fail.而不是It is imperative that this mission don't fail. it is imperative that? it is imperative that you ___there in person. it is imperative for us to remain on good terms 什么是imperative tense 什么是 imperative sentences Therefore,it is imperative for us to take drastic measures to put an end to 后面接什么是短语还是句子?希望给几个例句 imperative imperative It is imperative that we should practise criticism and self-criticism.书中例句,practise criticism what is that?It is C.为什么是 It is? it is imperative that you include our office and escrow number on your wire remittance求翻译 It is imperative that you ___ here in time(a)shall arrive(b)must arrive(c)could arrive(d)arrive 为什么是what fun it is to. 为什么是It is said that 而不是It said that Is this your book?Yes,it is为什么是it is 而不能说it's what do you think is it?为什么是is it而不是it is