Dear Mrs Xie:

      I am writing this letter to present my sincere gratitude.

      Thank you taking time to show me lessons hard to comprehend and care for me.

      Today you retired and you will be leaving us.I really don't give up.

      Still remember the last time I am deteriorating . IS that you give me encouragement, let me determine the way forward, let me have the power.

      For my future,I must study English hard and get good grades.

      For all things you gave me.

      I can't thank you enough!

                        Your student: