石油也可以是由珊瑚虫的石灰质骨骼形成．（是/否）______．

根据文章大意和首字母提示，填写单词，使短文通顺、完整。每空限填一词，并将完整的单词写在文章后的答题线上。

At 8:30 in the morning, the body of a man was found. Someone murdered（谋杀）him. A small (1) k____________ was found near the body. Maybe the murder used that knife. The police doctor said, “The man (2) d____________ about eight hours ago.” So the murder had possibly happened between midnight (3)a____________ one o’clock.

The police questioned three men. They didn’t tell the three men about the murder. The first man said he had been at home the whole evening and was (4) r____________ magazines, (5) t____________ he went to bed early.

The (6) s____________ man told the police that he had spent the evening with some of his friends. They had been to cinema together. He got home at about 11 o’clock.

The third man said he didn’t know (7) a____________ about the murder. He also said he didn’t have a knife. Of course the police (8) e____________ found out who the murder was.