helf a hour 和helf an hour哪个对?追加悬赏哦

helf a hour 和helf an hour哪个对?追加悬赏哦 When he got the cinema,the film （ )for helf an hour.A.has begun B.had begun C.has been on D.had been on helf apples是什么意思 I have a shower after I get upI have breakfast at seven和I leave home at helf past seven的上一句 __________your helf,i passed the exam.a.thank you to b.thanks for c.thank to d.thank for what time do you usually go to bed?At helf ()nine half an hour 和a half hour有什么区别? half an hour和a half hour一样吗? half an hour和a half hour一样吗? a和an怎么用,hour为什么是an One and a half an hour 和An hour and a half 有什么不同 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? a hour 还是 an hour如题如题如题 a one -hour还是an one-hour a half hour还是half an hour? half an hour or a half hour? half hour =half an hour half hour half an hour 的意思有和区别? an hour and half还是an hour and a half