选词填空:indicate (para. 9), indicator (para. 1), indication (para. 3) Given that half of all employed seniors, __________ are that a large number of students are at a risk of compromising their school careers with their part-time job. Our findings _____ that for many students, working 20 hours or more a week can contribute to decreased school performance and incresed drug and alcohol use. We also contrsted workers with no-workers, on different _______ (复数) of their commitment to education.