A、Every ten minutes. B、Every other hour. C、Every hour. D、Every half hour. D

W: Excuse me?
M: Yes, madam. Can I help you?
W: Could you tell me where the bank is?
M: It’ s upstairs across from the coffee bar.
W: Thanks. Do you know what time it opens?
M: It should be open now. It opens at 8:00 a. m.
W: Good, and can you tell me how often the buses leave for the city center?
M: Every half hour. And you just missed one.
W: Oh, dear, then I’ll have to wait for another thirty minutes. Thank you very much.
M: That’s OK.
Q:
11. Where is the bank?
12. How often do the buses leave for the city center?