How many hours of daylight are there on the march 21st.中的the是否错误?请指出.the是没有必要还是错误?

how many minutes in 2 hours how many hours are in a day how many hours one day?for happy How many hours do you sleep every night?中的how many hours how much time how long how often how many hours（days..）可不可以等于how long? 各位大哥,帮我翻译一下Are you healthy? If your answer is yes ,you have many good habits.How to keep healthy?I think you need do exercise an hour every day and eat a lot of fruit and vegetables.You drink milk and sleep nine hours every da How many hours will you stay for?这话有错吗How mang hours will you stay? 请教一下：——————hours of sports do you do every day? A How long B How many 选哪个 谢谢 How many hours did you study English last week?回答 How many hours are there in a day? How many hours do you sleep every day?怎么回答 How many hours are there in 7 days How many hours do you sieep every day怎么回答 how many hours you watch TV each day,on average? How many hours does the store friendly什么意思 how many hours does he work every day? How many hours __ he sleep every day? 请问 how many hours的同义句是什么?急用