冠词 an one-hour 还是a one-hour
冠词 an one-hour 还是a one-hour
a one -hour还是an one-hour
是a one-hour ducumentary还是an one-hour documentary
an hour one hour
one and a half hour看做单数还是复数?half an hour
a hour 还是 an hour?
a hour 还是 an hour
one and a half hours 还是hour
One and a half an hour 和An hour and a half 有什么不同
a half hour还是half an hour?
one and a half hours 和 an hour and a half 就是说 超过一个小时候 hour
half an hour 与 one half hour区别