Directions: Complete the following passage by using ONE word that fits the context.
Because neither she nor her husband smoked, Mrs. Trench was surprised to see cigarette ash on her doorstep as she entered the house. When she opened the living-room door, she was astonished to see a strange man fast 48 in an armchair! Taking care not to disturb him, Mrs. Trench left the house at once. She called a taxi and went 49 to the police station. When she got there, she lost no time to explain 50 had happened and added that the man 51 have got into the house 52 an open window. Mrs. Trench returned home 53 a police car together with two policemen. But it was too late: the man had disappeared. Hurrying upstairs, she went to her dressing-table. She smiled 54 relief when she saw the only thing that man had taken was an imitation diamond necklace that was almost 55 !(答案)asleep
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(答案)asleep
解析：
48．根据下文的not to disturb和本句中的fast，可以确定填asleep。fast asleep“熟睡”作see的宾补。
49. 根据文章意思可知，这里应指径直到警察局。故填straight。
50. explain后接宾语从句，而从句中缺happen的主语，故用what。
51. 本处指的是对过去情况的肯定猜测，故用must。
52. 这里指的是“通过开着的窗户进入屋子”，故用through。
53. 本句指的是坐警车回家。故填in。
54. 当看到只是一条假的钻石项链被偷，因此是指宽心地笑了。smile with relief宽心地笑。
55. 假的项链应是“没有价值的，不值钱的”。故填worthless或valueless。