两学一做党课内容:play on the "sand"还是"sands"?为什么?

play on the "sand"还是"sands"?为什么? basketball,we,field,play,on,the(.) 在床上玩耍是play on the bed还是play in the bed? The boys play football on every Monday afternoon Where is Robert? He ____(play)football on the playground. 英语问题 "on the way" “弹吉他”是play the guitar 还是play guitar ;"弹钢琴"是play the piano吗“拉提琴”是play the violin Tom _(play)the games on the computer from 4:30 to 6:30. what does "play in the hey" mean? 可以说“get on the car "吗？