1, not needed. 2. Generally, an undergraduate must pass CET-4, which is also the minimum requirement for obtaining a bachelor's degree. 3, of course, the undergraduate course is also an undergraduate course, and even a junior college can take the exam, and it will take two years to graduate. 4. It depends on the schools in specific areas, but generally it will not exceed 5%. The pass rate mainly depends on the number of applicants, depending on the number of people in your session, that is, if there are 100 people in this session, but only 5 people apply for the college entrance examination, the admission rate is 100%. It's not easy to see how hard you work and how many people apply.