Would you like _______with me this weekend?  [ ]

A. to go fish    

B. going to fish    

C. to go fishing        

D. going to fishing

用手将一重为6N的物体全部压入水中，物体排开的水重为10N，此时物体受到的浮力为 _________ N；放手后物体将 _________ (选填“上浮”、“下沉”或“悬浮”)，物体的重力势能将 _________ (选填“增大”、“减小”或“不变”)，待物体静止时所受浮力 _________ N．