问题
填空题
Dear Prof. King,
Allow me to introduce to you Mr. Liu, the bearer of this letter. He is one of my former students and is going to enter your institute after graduation here. Will you please give him some necessary guidance about the entrance examination I shall be much obliged if you will show him any favor.
Yours
Alice
What does "obliged" mean（）
答案
参考答案：Grateful
解析：
obliged=grateful，意为“感激的，感谢的”。