YAC1L2-Grammar:Ser Occupations Sentences using ser and occupations/use/omission of indef article. This quiz requires you to log in. Please enter your Quia username and password. Quiz Log In Username: Password:   You must have Flash installed to take this quiz. Quiz created by: Donna Pearson This activity was created by a Quia Web subscriber. To learn how to make your own, just like this, click here.