I understand that college students like to 17 parties, movies, and lots of activities, but you also have to learn how to do without certain things.
答案：(A) indulge in
indulge in 是「盡情享受、沉溺於」，符合大學生盡情參加派對、看電影、參與各種活動的語意；dwell in（居住於）、attend to（處理、照料）、apply to（適用於、向…申請）語意都不合。
答對率 14%，而且高分群答對率反而比低分群低——誘答選項對讀得懂文章的人特別有殺傷力。
錯的人多半不是不會 indulge in，而是把 attend to 讀成「參加」。attend 當「參加」時直接接受詞（attend a meeting）；多一個 to 就變成片語動詞 attend to ＝ 處理、照料（＝deal with）。差一個 to，意思完全不同。
attend 來自「把心思伸向某處」，分成兩支：一支是人到場，attend a meeting → attendance（出席率）；一支是照料，attend to a patient → attendant（服務人員），最常見的就是 flight attendant。空服員不是「去搭飛機的人」，是「在飛機上照料乘客的人」——記住這個，兩者就不會再混。
也是差一個介系詞：dwell in ＝ 居住於（＝live in）；dwell on ＝ 老想著、反覆談某件不愉快的事（Don't dwell on your mistakes.）。
indulge in ＝ 盡情享受、沉溺於，帶「過了頭」的語氣，正好接上後半句的告誡 but you also have to learn how to do without certain things。
indulge in（盡情享受、沉溺於）、indulge oneself（放縱自己）、attend a meeting（出席會議）、attend to a matter（處理事情）、attendance（出席、出席率）、flight attendant（空服員）、dwell in（居住於）、dwell on（老想著）、apply to（適用於）／apply for（申請）。
Dear Son,
I am very happy to hear that you are doing well in school. However, I am very concerned with the way you 16 money. I understand that college students like to 17 parties, movies, and lots of activities, but you also have to learn how to do without certain things. After all, you must live within a limited budget.
18 the extra money you want for this month, I am sorry that I have decided not to send it to you because I think it is time for you to learn how to live without my help. If I give you a hand every time you have problems with money now, what will you do when you no longer have me to support you? Besides, I remember telling you I used to have two part-time jobs when I was in college just to 19 . So, if you need money now, you should try either finding a job or cutting down on your 20 .
I understand it is not easy to live on your own. But learning to budget your money is the first lesson you must learn to be independent. Good luck, son. And remember: never spend more than you earn.
Love, Mom