Robert is thirteen years old now , but he still remembers one day ten years ago, when he tried to get a bottle of milk from the fridge. The bottle fell to the floor and the milk spilled  all over the floor. When his mother came into the kitchen , she didn't shout at him"Oh, Robert, it is _ . Well ,would you like to play in the milk for a few minutes ?" she said. Robert was very surprised ,but he began to play in the milk quickly, after a few minutes, his mother said ," You know ,Robert, when you make a mess like this ,you have to clean it yourself ." He then cleaned the milk with his mother. His mother then said, "It's hard to take a big bottle with your two small hands. Here is another bottle .Let's see how to find a better way to take it." The little boy learned that if he took the bottle near the top with both two hands , he could do it easily . Robert also learned that it wasn't always bad to make mistakes .It was just the mistake that helped him to learn new things. What a good lesson!! Later, Robert's mother told him   _  .
how to clean the milk how to sweep the floor how to use his hands. how to take a big bottle