A、Customer and repairman. B、Patient and doctor. C、Lawyer and client. D、Boss and secretary. Ato fix my bike意为“修理自行车”，所以说话人之间应该是顾客

M: Can you tell me what time it is now?
W: My watch says 10: 30, but it is always 10 minutes late.
Q: What time is it now?

W: How long will it take you to fix my bike?
M: About half an hour.
Q: What is the probable relationship between the two speakers?