阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。
One day, Jim played basketball in the living room after school. When he was playing in high spirits, his basketball 1 a vase off the shelf by accident and the mouth of it knocked off a large piece. What made him more2 was that the vase was rare and valuable. To cover the great 3 he caused, he glued the pieces together and put the vase back to its place.
While cleaning the vase after work, his mother 4 the change on it. At dinnertime, she asked Jim if he 5 the vase. Being afraid of punishment, Jim said a wild cat jumped in from the window and knocked the vase off the shell. His mother was quite clear that he was 6, for all the windows were closed before she went to work. However, his mother just remained 7 and said it was her carelessness not to have the window closed.
Before going to bed, Jim's mother asked him to go to the study. He felt he couldn't 8 the punishment.
When he entered the study in fear, his mother's face appeared no sense of 9. Instead, she took a chocolate box out of the drawer and 10 one piece to him. “Jim, this chocolate is a reward for you, for you11 a cat that could open the window, with your imagination.” Then, she put another chocolate in his hand. “This chocolate is a reward for your topping12 to restore (修复). You restored with glue, the cracks were filled almost perfectly. 13remember, to restore a vase needs more powerful glue and higher 14 skill. Tomorrow, let's bring the vase to the15 to see how they'll make it as it was.” With that, his mother took the third chocolate, “The 16 chocolate stands for my deep apology (歉意) to you. As your mother，I shouldn't have put a vase in a place where it could so 17 fall down, especially when there is a boy fond of sports.”
“But, Mum, I ...” His mother18him and said. “My chocolate box has been 19, so our talk is over, too. Now, go to bed!” Then she left for her own bedroom. The following days were the same as before. The only 20 was that Jim never told a lie since then.
