half a class 用单数还是复数?

half a class 用单数还是复数? Half of the class后接单数还是复数 half zhe class是单数还是复数?half zhe class is going to...Or half zhe class are going to... half是单数还是复数 half 是单数还是复数 one and a half 加复数名词后面谓语动词用单数还是复数 是a half hours还是a half hour?a half后面是单数还是复数啊? one and a half years 谓语动词用单数还是复数?one year and aone and a half years 谓语动词用单数还是复数?one year and a half 谓语动词用单数还是复数? 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 and a half 后面加名词单数还是复数? one cake and a half 谓语是单数还是复数 a year and a half后接谓语动词用单数还是复数 one and a half后面的谓语要用单数还是复数为什么 one and a half 后用谓语动词单数还是复数? an hour and a half 做主语时,谓语用复数还是单数 one and a half apples 后面的谓语用单数还是复数? half class做主语谓语动词用单数还是复数?Listen!The class __ in the classroom.A.is sing B.is singing C.are sing D.are singing 这道题应该选什么？