A、10. B、11. C、12. D、13. D

M: Miss Smith, I told Dr. Brown that I would call him in the Houston office at ten o’clock their time. Please find out the time difference for me so that I’ll know when to place the call.
W: It’s two hours earlier in Houston, Sir. I know without looking it up because my sister lives there.
Q: When should the man place his call to Houston?

W: I set up the conference table for a dozen people, but Mr. Wilson called and said he can’t make it.
M: Don’t change anything yet. We didn’t expect Mr. Miller, but I just heard he intends to come after all.
Q: How many people are now expected at the meeting?