Sam came to Tom's house for dinner, but the kitchen was nearly empty. Tom offered Sam a glass of whisky because Carol did not have any beer or wine, and she refused to buy any. At seven o'clock, it was time to have dinner. Carol served roast beef and potatoes. Why? Because her shopping list explained everything: they had a lot of potatoes at home, and Carol went to the butcher's for the meat. Sadly, Tom and Sam already had roast beef and potatoes for lunch. They had to eat the same food again tonight!