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

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ittookthem()tofinishthework请问选哪个?oneandahalfhours还是oneandahalfhour请问选哪个啊?理由说下谢谢ittookthem()tofinisht

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
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

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
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

选第一个,你把one and a half当作一个整体,那么这个整体应该是一个复数。因此hour要加s。