Open ClozeExercise 20 of 79

Hi Alex, Thanks (0) FOR the invitation to your birthday party on Saturday. It's amazing to think that a year has passed (1) .......... your last one. I know your party starts at 3 o'clock, but I might be a bit late (2) .......... I have an important exam at school at 1 o'clock. I'm not sure of the directions…