Turn the following sentence into English and write your sentence on the answer sheet.
警察经过彻底调查后得出结论，这起车祸是酒后驾车造成的。
【正确答案】：
AFTER A THOROUGH INVESTIGATION THE POLICE CAME TO A CONCLUSION THAT THE CAR ACCIDENT HAD RESULTED FROM DRUNK DRIVING. 
【题目解析】：
本题考查常见动词、名词短语及定语从句的使用。
彻底的调查：a thorough investigation；得出结论：come to a conclusion；由...造成：result from...；酒驾：drunk driving。
句子结构：主干为“警察（经过彻底调查后）得出结论”，“这起车祸是酒后驾车造成的”是定语从句。