It took us __to waik to the factory last Saturday A.one and a half hour

It took us __to waik to the factory last Saturday A.one and a half hour
It took us __to waik to the factory last Saturday A.one and a half hour

It took us __to waik to the factory last Saturday A.one and a half hour
one and a half hours 或者是 one hour and a half
只要前面的数次超过1,就算复数了,要加s

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