以下文字与答案无关
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B：in
C：open
D：about
E：last
">18.When I went to bed 21 night, I fell asleep immediately. I must have been tired because I had been working so 22 for several hours. So I forgot to close the windows before getting into bed. If I had remembered, the thief would not have got 23 . But he was given a perfect opportunity to enter the house. The next time, I work late I will lock the house carefully. A policeman came to see me 24 the theft. "I've been told to investigate," he said, "so I want to ask you some questions." "First, how did the thief get in ?" I told him that I had left the window 25 . "You should be more careful, "he said. "If people looked after their houses properly, we wouldn't have much work to do." (1)、A：hard
B：in
C：open
D：about
E：last
