College students generally need to pass CET-3, CET-4 for undergraduates and CET-6 for postgraduates. Therefore, CET-5 is useless at all. Graduate students must take CET-6, while undergraduates who study English must take CET-6 if they want to develop better or go to a better company in the future. At present, junior college students will not take the Grade 3 exam specifically, but take the Grade 4 exam directly. After all, the higher the certificate level of the English test, the more helpful it will be to find a job in the future, so everyone will basically not take CET-6, but directly choose the highest level in the range. But you can't take CET-6 directly. You must pass CET-4 before you can apply for CET-6. Belongs to the national unified examination, unified fees, unified organization, social adults (that is, college students who have graduated or social people who have not attended college) can not take the CET-4 and CET-6.