( ) ( )hours are there in a day?

( ) ( )hours are there in a day? There are[ ]hours in a day there are 24 hours a day还是in a day There are （ ）hours in a day.用数词填空 How many hours are there in a day? There are ( )hours of sunlight a day how many hours are in a day there are ------hours of sunlight a day in winter than in su There are 365 days in a year.We sleep 8 hours a day,so we ha There are 365 ( )in a year.We sleep 8 hours a day so we have There are ______ hours in a week. There are什么hours in a week