the conductor__________him for a while

问下for a while,in a while,after a while,all the waiting,while,I,for,bought,a,the,bus,newspaper While he ----(wait) for the bus,he ------(read) a book. The children argred__this for a while and then made friends After ___ for a while,the whole building fell down the battery is too low charge for a while before 是Resting for a while还是Rest for a while for a little while是什么意思 用for a while造句 for a while 和 in a while的区别 for a while和in a while有什么区别? for a while和after a while的区别