you must keep your son ____ nine hours a day .

you must keep your son ____ nine hours a day . You need to keep your son ____ at least mine hours a day. you must keep your Now let's play a game First you must keep your eyes ____ It is important for children ____(sleep) nine hours a day he cannot get up about two hours each day,but you must keep ( ) 1.____ hours do you study at school a day ok you must keep your You must keep your eyes______.A.close B.closed My son often sleeps nine hours every day 改为一般疑问句 Turn off th You must keep your door .(open). 3 you must keep your room_____