half of population是单数还是复数

half of population是单数还是复数 half 是单数还是复数 half是单数还是复数 a population of 谓语单数还是复数? "half of the money"是单数还是复数 half of the books 做主语是单数还是复数 half a kilo of meat是单数还是复数 half the books是单数还是复数 half zhe class是单数还是复数? half an hour 是单数还是复数 eithty percent of the American population后面谓语是用单数还是复数,. Half of the class后接单数还是复数