t---which 77. many---muchР78. In addition to---去掉 to 79. appreciate后加it 80. him-themР81. 书面表达Р参考范文РDear Jessica,РI’m Li Hua. I’d like to express our sincere thanks to you for all you have done for us during your stay in China.РIn the past year, we all have known you’re such a kind and friendly teacher. How can we forget the time we spent together happily? We still remember you don’t hesitate to help us whenever we have trouble learning English. Therefore, we’re grateful to you from the bottom of our hearts and we owe a lot of thanks to you.РAs the saying goes, true friendship never ends, so I hope we can keep in touch with you. I also expect you e back to China and stay with us in the near future.Р Wish you a pleasant trip. Looking forward to hearing from you soon.РYours faithfully,РLi Hua