题目内容：

根据短文内容及所给提示，在文中的空白处填写一个正确的单词。

Detective stories have been popular 1. Conan Doyle wrote his famous stories about the great detective Sherlock Holmes. Readers read this kind of stories mainly 2. pleasure.

In a s3.， a man was murdered. Who did it and why? Mr. X hated the dead person and wanted to kill him, 4. had no chance. He was somewhere else when the murder5. place. Mr. Y could do it easily, but seemed to have no 6. to do it. Mr. Z had got all the dead man's money, so he had reason for 7. (kill) him. Was X, Y or Z the murderer? Or was it somebody e8.？ In the end the detective 9. out the answers to all the questions, and the story ended 10. the mystery solved.

The ending was unexpected. The criminal turned out to be that nice Mr. C, who you 11.(think) would never hurt an ant!