题目内容：

it took them()to finish the work 请问选哪个?
one and a half hours
还是 one and a half hour
请问选哪个啊?理由说下谢谢

优质解答

one and a half hours一个半小时是属于复数的.
也可以说：
one hour and a half这是一个小时加上半个小时：就是一个半小时