Boys and girls need eight or nine hours sleep every day.翻译

Boys and girls need eight or nine hours sleep every day.翻译 we need to sleep eight or nine hours every night.为什么need后加to i need nine hours' sleep every night.改为同义句 School students need eight hours of sleep a day,____? You drink milk and sleep nine hours every I sleep for nine hours every night Theanimal usually sleep and（）20 hours every day. young people need to sleep at least eight hours a day同义句 it is n_ for you to sleep eight hours every day. To sleep at least eight hours every day is very necessary fo 1._____ sleep do you need?Nine hours’sleep. She sleep nine hours every night 对nine提问