I sleep eight hours a day 就eight提问快

I sleep eight hours a day 就eight提问快 i sleep for eight hours.中的for必须用吗? I sleep _____ (大约) eight hours every day. sleep、eight、for、day、a、i、hours怎么写成句子 I sleep eight hours for every night. 和 I sleep for eight hours every night.哪个对? .Every night I sleep eight hours.（对划线部分提问） 划线部分为eight. eight hours' sleep 同义词 是不是eight-hour sleep 英语翻译I _________________ ____________________ ____________________ __________________ sleep eight hours a night I b___ it's important to sleep eight hours a night I think it's important for us ____(sleep) eight hours a night.为什么填to sleep? eight hours' sleep a night=Eight hours of sleep every night吗 i usually sleep eight hours every night 就“eight”一词进行提问_____ _____ _____ do you usually sleep every night? 1,important,eight,every,hours,tu,is,night,it,sleep 2,tired,have,headaches,i,and,am,of,lot,a it,important,I,sleep,a,hours,is,believes,to night,eight(.)(连词成句)答得好的给悬赏！ Usually I sleep for eight or nine hours a night.中为什么要用介词for而不用介词about? I think is necessary for us to sleep for eight hours everyday.同义句I think __ __ for us to sleep for eight hours everyday.漏掉了，是 I think it is necessary for us to sleep for eight hours everyday.同义句 have at least eight hours' sleep 的同义句 _________ necessary for students ________ sleep eight hours every night