Student or Learner
I can't figure out whether "on" is necessary here. Can you help me please?
A: How was your trip to France?
B: Great but on the first day, it was quite hard to understand my customers.
A: and how was it on the second day?
Thanks a lot,
Can we use "in" instead of "on"?
Please, correct all my mistakes. I should know English perfectly and if you show me my mistakes I will achieve my dream a little bit faster. A lot of thanks.
Not a teacher nor a native speaker.