▲ 閱讀下文，回答第 41−45 題        A gap year is traditionally described as a one-year break from a student’s education. In somewestern countries, it is common for high school or college graduates to take a gap year beforegoing into college or after completing their undergraduate studies. During this time, students canengage in a variety of activities ranging from working or learning to volunteering or traveling.For example, some students travel to another country to learn a foreign language, take anadventurous journey, find employment, or work to save an endangered species during theirgap year.       Supporters of the gap year believe that the one-year leave provides students with perfectopportunities to explore the real world and expand their visions. In addition, with such aproductive year of personal life experiences, these gap-year students will be able to furtherdevelop their resumes to benefit their future career search.       However, opponents argue that one year away from school can lead to unsatisfactoryacademic progress because students treat it as an opportunity to take a break and have fun.Because some gap-year experiences like studying abroad or other academic learning programscan be quite expensive, financial concerns are often considered a major disadvantage ofundertaking a gap year. Whether to take a gap-year leave, students will have to discuss with theirteachers and parents.
【題組】41. What is the main idea of the passage?
(A) The cost and time of gap-year activities
(B) The purposes and programs of a gap year
(C) The types and contents of gap-year activities
(D) The advantages and disadvantages of a gap year