Eighty percent of all college students in the U.S.have at least one part-time job. Some even work full-time. It takes their focus away from school and gives them little time for academics.(compound-complex sentence)
【正确答案】：10.Eighty percent of all college students in the U.S.have at least one part-time job, and some even work full-time, which takes their focus away from school and gives them little time for academics.