How can Xiaoyu thank her mother after she finishes a difficult problem? Please use your imagination and write it down.
Xiaoyu felt very happy after her mother told her a difficult problem. Because, I will never be bothered by this problem again.
Xiaoyu took her mother's hand and said happily while shaking it, mom, you are great. You can solve such a difficult problem. I must study hard to repay my mother.