假定你是李华，经常帮助你学习英语的朋友Alex即将返回自己的国家。请给他写一封邮件，内容包括：
1. 表示感谢；
2. 回顾Alex对你的帮助；
3. 临别祝愿。
注意：
1. 词数80左右；
2. 可适当增加细节，以使行文连贯。
                                                                       
                                                                      
                                                                      
                                                                      
                                                                        
                                                                        
                                                                        
                                                                        
（B）
Dear Alex,
Learning that you’re leaving for the United States soon, I’m eagerly writing to express my heartfelt gratitude to you for your help.
Honestly speaking, it’s so nice of you to offer me a class of practical learning skills. Under your professional guidance, I have made such unbelievable progress in English. It’s indeed a pleasant surprise for me to even rank first in a recent English speech contest. Whenever I encounter difficulties, you always cheer me up and help me out, which fuels my enthusiasm for English and promotes me to regain tremendous confidence. No words are strong enough to convey how grateful I am.
Thanks again and wish you a pleasant journey home.