用be的正确形式填空.
He( )atthehotielastweek. 2.We( )studentstowyearsago. 3.They( )onthefarmamomentago. 4.YangLing( )elevenyearsoidlastyear. 5.There( )anappleonthepiateyesterday. 6.There()somemilkinthefridgenow.