If possible, write a long and flowery（华丽的）thank-you letter to show your sincerity.
举一反三
- After an acquaintance has given you some advice, usually we should write a formal thank-you letter to show your gratitude.
- 中国大学MOOC: after you have received a congratulation letter, it is polite of you to write a letter back to show your ________
- When you write an e-mail, please _________. A: fit your message into one screen B: write as long as possible
- Write your thank-you letter within a few days of whatever happened.
- You must buy expensive gifts to show your sincerity.