第一句：I took the wrong bus.
A: Oh, no. I took the wrong bus. Please let me off here.
B: Sorry, Miss. I'm afraid I couldn't do that right now. You can get off at the next stop.
第二句：I got on the wrong bus.
A: Excuse me. Does this bus go to Zhongshan Road?
B: I'm afraid not.
A: Oh, I got on the wrong bus. Can I get off there?
B: No. You have to wait until next stop.
You've got on the wrong bus. 你上错车了。