Never expect.Never assume.Never ask.And never demand.Just let it be.If it's meant to be,it will happen.的中文意思是?

never expect,only hope we can never we can never expect a bluer sky unless we create a less polluted world.2009 安徽高考 Never never never Never never NEVER never. NEVER never never never . never Never the window is never open （ ）in summer.A.except B.besieds C.but D.expect where is my way out?I never expect a splendid life.I never ask too more about life.I dare say I 翻译成汉语 We can never expect a bluer sky___ we create a less polluted world.答案是unless,为什么不能填until?