It is ok to leave the previous graduates' postgraduate entrance examination work experience blank, but as long as the time is uninterrupted, it is also ok to fill in the unemployed, because many people quit for postgraduate entrance examination. According to the requirements of the Ministry of Education, previous graduates should choose the registration point where the candidates are registered or where their work units are located. If you choose the location of your account, you don't need to provide a work certificate.