Yes, you can brush it. According to my experience in using the massive open online course APP of China University for several years, I can tell you responsibly that even if you miss the unit test of a certain unit, you can still brush the course of this unit, and you are still qualified. In fact, most courses in China University's massive open online course APP can be brushed before the end of the semester, but unit tests are often not. The unit test of the massive open network course in Huada University is invented and set up to prevent college students from being unhappy in class at ordinary times and brushing classes at the end of the period. Therefore, the unit test is generally aimed at urging college students to study, and the time set is short. If you don't attend class seriously on weekdays and don't insist on continuous brushing, then you are likely to miss the unit test. Moreover, many teachers' attitudes on this issue have never been accommodating. It is actually very easy to solve the problem of missing unit tests. You just need to keep in touch with your classmates and ask them to remind you to do the unit test.