it's took us three hours to visit half of it

Question

It took us_____ to vistit our school
A.two and a half hours
B.two hours and a half hour
C.two hour and a half
D.two and a half hour
请帮忙分析正确选项,并分析表示此类时间的用法,

Answer 1

A
one hour
two hours
a half of hour
twor and a half hours
凡是大于1小时的用复数
小于等于一小时的用单数