there is a blackboard （） the front wall.(A.on B.in C.at)如题

1Here is some juice for( )(she)brother.2The man buhind （ )(he)is our friend.3Look at the blackboar.there are some squares on( )(it).4Can I stand beside （ )(they)5I have a brother.（ )is only one year old .I like( ).(his)6there are many toys.Let' Is there a window? There is a middle there is a cat there is a problem Is there a school Is there a house___? There is a Is there a. there is a There is a kitshen. There is a pair over is village a there there (.) There is a long r______ there. There( )(be)a football match,is there. there is a baby horse over there. there ,a there,is ,phone如何排列? where there is a life,there is a hope.