一、用下列介词in,at,on,across及其他介词填空
1、They spend most of the day sitting_____(the window)and watching what is happening outside.2、Our teacher is writing some English words________(the blackboard).3、I remember seeing you one evening_____(my uncle's).4、A stone hit him______(the head)and it knocked his glasses off.5、When Igo to cinema,Iprefer to sit_____(the front row).6、It was a lovely day.There wasn't a cloud____(the sky).7、The woods are____(the river).8、I like the countryside.I think I'd like to work____(a farm).