Passage Three Questions 31 to 35 are based on the following passage. During the Christmas shopping rush in London, a story was reported of a tramp(流浪者)who, apparently no fault of his own, found himself locked in a well. known chain store late on Christmas Eve. No doubt the store was crowded with last. minute Christmas shoppers and the staff were dead beat and longing to get home. Presumably all the proper security checks were made before the store was locked and they left to enjoy the three-day holiday untroubled by customers desperate to get last-minute. Christmas presents. However that may be, our tramp found himself alone in the store and decided to make the best of if. There was food, drink, bedding and camping equipment, of which he made good use. There must also have been television sets and radios. Though it was not reported if he took advantage of these facilities, when the shop re-opened, he was discovered in bed with a large number of empty bottles beside him. He seems to have been a man of good humor and philosophic temperament-as indeed tramps very commonly are. Everyone else was enjoying Christmas, so he saw no good reason why he should not do the same. He submitted(屈服), cheerful enough, to being taken away by the police. Perhaps he had had a better Christmas than usual. He was sent to prison for seven days. The judge awarded no compensation to the chain store for the food and drink our tramp had consumed. They had, in his opinion, already received valuable free publicity from the coverage the store received in the newspapers and on television.

Passage Three“The staff were dead beat”in the first paragraph means that they were______.