Mrs Wang:

I really want to express my gratutide to you.When I was studying in the school,you always helped me and you would never be bored. At that time my English was indeed poor ,you dramatically handed me out of the depression.One day, I was disappointed,and you said to me that whatever I would be in the future,I should be happy from the cradle to the grave.Now my English is still poor,but I keep on reading English every day.When I am faced with difficult problems,I will always deal with them with a good attitude.The final exam is coming,and I will try to embrace it happily.I will never forget what you have said to be happy every day.

Yours sincerely

XXX

如果是百分制的话，65分吧。