英语疑难whilemyfriendgeorgewasreadin
while my friend george was reading in b they went into the dining room 第一句中in bed 而第二句中却在名词前加the，如何知道该加不该加the?
in bed 在床上, 无所谓哪个床. into the dinning room是相对于bedroom, 强调不同的房间.