阅读下列短文，从每题所给的四个选项A、B、C和D中，选出最佳选项。

　　Mrs. Harrington was glad to be back at the block of flats where she lived. Her shopping had tired her. In the  1 her thoughts were on lunch and a good rest; but when she got out at her own floor, both were forgotten in her  2 discovery that her front door was  3 . She was thinking that she must blame her daily  4 the next morning for such a terrible piece of carelessness, when she remembered that she had  5 both keys in their locks. She walked slowly into the hall and at once noticed that all the  6 were open, yet following her regular practice she had shut them before going out. Looking into the drawing room, she saw a scene of  7 over her writing desk. It was as clear as daylight then that her flat had been broken in during her  8 . Her first angry thought was to go  9 all the rooms looking for the thieves, but then she decided that at her age it might be more  10 to have someone with her, so she went to  11 Mr. Johnson from the first floor. By this time her legs were beginning to tremble, so she sat down and  12 a cup of very strong tea while he telephoned the police.

　　Then they went back and through the rooms, being careful to touch  13 , as they did not want to hinder(妨碍) the police in their search for  14 . It seemed as though everything she  15 had been thrown out and turned over and over. Then a police officer arrived with a policeman and she told them of her  16 of her robbed flat. The police officer began to look for fingerprints, while the policeman  17 that the front door locks had not been  18 , which proved that the thieves had either used some  19 or entered over the balcony(阳台). There was no trace of fingerprints, but the officer found a dirty red pack that  20 jewelry which the old lady said was not hers. So the entry into this flat was clearly not their first job that day.

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