the children ( ) on the playground when l left school 为什么用we

the children ( ) on the playground when l left school 为什么用we __you__ on the playground when you were at middle school? library is on the left of the playground near the school gat The children (fly)kites on the playground when it began to r The children _____ a P.E.class on he playground when it sudd After school he ( ) baseball on the playground. The headmaster saw the children playing on the playground the headmasteu saw the children playing on the playground (变 like,on,is,there,a,of,left,the,playground,the the,we,having,on,were,the,playground,fun,ring,when,bell连词成句, Look!( )children( )playing on the playground.A:The number of We often ___(play) on the playground.