half the food是复数还是单数

half the food是复数还是单数 half the books是单数还是复数 half是单数还是复数 half 是单数还是复数 half an hour 是单数还是复数 half of population是单数还是复数 Half of the class后接单数还是复数 是a half hours还是a half hour?a half后面是单数还是复数啊? half of the two people 后面的谓语动词是复数还是单数? half of the money是单数还是复数最好给出理由 half of the books 做主语是单数还是复数请说明仔细一点. one apple and a half是复数还是单数? half a kilo of meat是单数还是复数 one cake and a half 谓语是单数还是复数 half of the class后谓语是单数复数 half 加名词单数还是复数比如 一半的青少年 half the +teenagers还是teenager half后加名词单数还是复数 half a class 用单数还是复数?