Once ___of oxygen ,the brain dies.a、depriving b、 deprived c、 to be deprived d、 having been deprived

Once ___of oxygen ,the brain dies.a、depriving b、 deprived c、 to be deprived d、 having been deprived I don't like the skirts .___of them are nice. You are my oxygen.I cann 't live without you.You are my oxygen.I cann 't live without you.感情方面的啊！ oxygen是什么 oxygen pipe Liquid Oxygen once the required oxygen or carbon dioxide contents have been obtained,recourse has to be made to various procedures to maintain the composition constant.owing to the many factors causing variation in the oxygen and carbon dioxide contents .这句怎 Once_____ oxygen ,the brain dies .A:deprived of B:depriving ofC:having deprived of D:deprived该怎么选呢 还有这里的once怎么理解呢 1.Is she going to visit the museum?I don’t know.(用宾语从句改写句子).I don’t know ________________________________________________.2.These plants will produce food and oxygen.(改为被动语态).Food and oxygen _________________________ either/neither的题Can you speak English or Chinese?___of I can't speak.A.Either B.Neither I don't know ___of them,Ionlyknow a few of themA.all B.any c.none为什么 once! once once Once once Once once