Section D According to a 20 , about 25% of college students have a part-time job. By the upcoming summer vacation, this figure will 21 22%. College students are working as tutors, waiters or salesmen. Why do they want part-time jobs? First, they want to earn money to help cover the increasing college tuition. Second, they hope to be economically 22 and buy what they need. 23 , by doing part-time jobs, college students can gain some social experience and 24 their horizons. What's more, part-time jobs can provide them with a valuable opportunity to know the outside world.