one hour and a half谓语动词为什么用单数?而one and a half hours谓语动词用复数?

one and a half hours 还是hour The meeting lasted for ( ).A.one and half a hour B.one and half hour C.one and a half hours D.one and the half hour one and a half hour 中hour是否加s half an hour?half an hour、an hour and a half 、 one and a half hours和one half hour都能表示一个半小时吗? 56.The film will last for______A.an hour and a half B.an hour and half C.one and a half hour D.one hours and a half one month and a half和one and a half month有区别吗?还有one hour and a half和one and half an hour哪个对? it took them ____to visit our school.a one and a half hour b one hour and a half hour One and a half an hour 和An hour and a half 有什么不同 The boy always stays there for___a.one and half hour b.one and a half hour c.one and half hoursd.one and a half hours 是one and a half hours还是one and a half hour one and a half hours 和 one hour and a half的意思一样吗 one and a half hours还是one and a half hour one and a half hours?还是one and a half hour? 是one and a half hour 还是 one and a half hours 一个半小时 英语：是one and a half hour 还是 one and a half hours one and a half hour看做单数还是复数?half an hour one and a half hour 是否要加s one hour and a half加’s 还是s’