Can someone help me for conditional problem
If I (visit)11._______ Athens last year, I (phone) 12._______ you. If you (start)13._______ coming to the course earlier, you (could/ pass)14._______ the exam. If I (not/ be)15. _______ so shy at the party last Saturday, I (might/ make)16._______ more friends. If you (not/ spend)17. _______ so much money, I (not/ be)18. _______ angry. She (get) 19._______ promoted last year if she (not/ argue) 20._______ with the boss.