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Complete the dialogue using the correct preposition: ON - IN - AT
Lívia - Hi! What's up? You look tired!
Luca - I'm ok! But I have to study a lot, because I'm going to have a Math test Friday.
Lívia - Really? I'm going to have a test April too. Are you good in Math?
Luca - Not really ...
Lívia - I simply love Math! I can help you. Are you free Monday?
Luca - Yeah! I have class the morning, but I'm free the afternoon.
Lívia - Cool! See you two! Is it ok for you?
Luca - Perfect! I have to get a good mark! I dont want to take the final exams! 2015 I almost failed!
Lívia - Don't worry! I'm sure you'll get a good mark! And December you'll be free.
Luca - I hope so! Because my parents are planning to take a short trip December 15th!
Lívia - Relax! I'm sure you can make it! We will study hard, so Saturday we can go to the movies!