正确答案：
B
解析：
根据题干关键词Regular part-time work定位到原文第七段。首先根据第一句“under... during term time and full-time during vacation”可知留学生在假期允许全天工作，所以D项错误。根据第二句“It is impossible for students to expect to earn sufficient funds working part-time to Pay for tuition fees and living costs”, 可知选项C是错误的。根据第三句“such work is not always regular even when available”可知A项兼职工作是很容易找到的说法是错误的。因此根据排除法可以正确答案应该是B。
