是a one-hour ducumentary还是an one-hour documentary

是a one-hour ducumentary还是an one-hour documentary a one -hour还是an one-hour a half hour one hour对不对? 冠词 an one-hour 还是a one-hour 是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 中hour是否加s one hour 与 a hour 有什么区别 是less than an hour还是less than one hour? one and a half hours 还是hour One and a half______a.hour b.hours one hour and a half 是一个半小时 两半小时是不是 two hours and a half? The train is running fifty miles ______.　　A.anThe train is running fifty miles ______.　　A.an hour B.one hour C.the hour D.a hour 为什么答案是a?h应该是辅音字母歌哈 ______ and I'' get the work finished.A.Have one more hour B.One more hour C.Given one more hour D.If I have one more hour ——HOw long have they been watching TV ——For 急i!A.one and a half hour B.one and half an hour C.one hour and a half D.one hour and half a 主要是A,C,辅导书说A=C,那为什么答案是C不可以是A? it took them ____to visit our school.a one and a half hour b one hour and a half hour one hour and a half作主语谓语是单数还是复数?one and a half hours呢?