When I was teenager, I worked parttime at my uncle's pub.
One day, a man walked into the pub and (order) three beers. But just one of them (drink) by him. I was confused. The next day that man ordered three beers again and drank one of them (quiet) at the table. He did the same thing every time he came to the pub.
One day, I asked the man he ordered three beers and just drank one. The man replied, "It seems strange, isn't it? You see, my two brothers live abroad at the moment. We have had an (agree) that every time we go to a pub, each of (we) will order two extra beers."
A few weeks later, the man came to the pub again, but he ordered only two beers, not three as usual. I was (surprise) and thought that one of his brothers might have died. But when I asked him why he just ordered two beers, the man said, "I talked my brother, Tom on the phone yesterday. He had promised to give up (drink)."