how many hours one day?

how many hours one day? how many hours are in a day how many hours you watch TV each day,on average? How many hours do you sieep every day怎么回答 How many hours do you exercise every day? 同义句 How many hours do you work a day? how many hours does he work every day? How many hours are there in a day? How many hours __ he sleep every day? How many hours do you sleep every day?怎么回答 How many hours do you work a day?主语是hours还是you? how many hours等于什么?