After a while,all the lights in the hall———.A.went offB went outC went upD went down答案是选B,为什么?

问下for a while,in a while,after a while,all the After getting to the 8th floor,he p___for a while and then continued climbing. after a while=? after a while 意思 for a while 和 after a while 和once in a while 和 all the while的意思 和区别（求详解） after a moment .after a while .after a minute .after while 的区别 let'a talk all this over again-----it belonged to hima after b while c since d before in a while;after a while 的用法区别. for a while和after a while的区别 是after a short while还是a shortly while after dinner rest a while,after supper walk a mile after a time和after a while有什么区别 second later,after a while的意思 after a while,in a while ,for a short while的区别和用法 after a while用于什么时态能用after a while举个例子吗？ After a while,all the lights in the hall———.A.went offB went outC went upD went down答案是选B,为什么? 1、-Would you mind looking after this suitcase for me for a while? -_________________. AThat's all r1、-Would you mind looking after this suitcase for me for a while? -_________________.AThat's all rightBYes, I don't mindCNever mindDNo, of course I while you are away on holiday after all.这句话away是什么意思,如何翻译