Fill in the Blanks In - On - At (basic level)Online version Read the sentences and complete them with the appropriate preposition. by Daniel Alejandro Elvira 1 AT ON IN IN ON AT ON Complete the sentences with the appropriate preposition ( IN , ON , AT ) I have english class Wednesday My cristening was April . The movie starts seven o'clock . My cousin's birthday is September 21st ! My aunt lives 25 Main Street My favorite celebration is christmas , it is December . When is the party ? Is it Sunday ?