物理研究学习小组在探究物体所受重力大小与物体质量关系时，实验记录如下表：
Don't throw away some old things．We can____them．We can put our pens and pencils in____．They will be nice____．We can put flowers in some bottles；they will be nice____．We can stick some____together and put our cards in them．How interesting!
There we ____ ____ our tents and ____ a fire to ____ us ____ and cook food on.
