单项选择题

Visitors to Britain may find the best place to sample local culture is in a traditional pub. But these friendly hostelries can be (1) of potential discourtesies and offenses for the (2) .
An anthropologist and a team of researchers have unveiled some of the mysterious (3) of British pubs—starting with the difficulty of getting a drink. Most pubs have (4) waiters—you have to go to the bar to buy drinks. A group of Italian youths waiting 45 minutes (5) they realized they would have to (6) their own drinks. This may sound inconvenient, but there is a (7) purpose.
Pub culture is designed to (8) sociability in a society (9) . its reserve. Standing at the bar for service (10) you to chat with others waiting to (11) . The bar counter is possibly the only (12) in the British Isles in which friendly conversation with strangers is considered (13) appropriate and really quite normal behaviour. "If you haven’t been to a pub, you haven’t been to Britain. " This tip can be found in a (14) , Passport to the Pub: The Tourists’ Guide to Pub Etiquette, a customers’ code of conduct for those wanting to (15) "a central part of British life and culture". The trouble is that (16) you do not follow the local rules, the experience may fall (17) . For example, if you are in a big group, it is best if only one or two people go to buy the drinks. (18) irritates the regular customers and bar staff more than a (19) of strangers blocking all access (20) the bar while they chat and fuss about what to order.

16（）

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