Past Simple or Present Perfect Fill in the blankBelow is a conversation between two people. Choose which tense is the best answer.A: _______________________________ (you, take) the new train yet?B: Yes, I have. I _______________________________ (take) it 3 times so far.A: _________________________________ (you, have) any problems?B: No, I haven’t, except for last Saturday, when the air conditioning on my car _________________ (stop) working.A: Oh, no! It _________________ (be) very hot that day! What ___________________ (you, do)?B: I used my fan to keep me cool, and the train conductors _____________________ (open) one of the doors. It was OK. Fortunately, the air conditioning _________________________ (work) since then. I ______________________ (need, not) to use my fan again. In the last few days, the weather ______________________ (be) a LOT cooler thank goodness!​