Nobody witnessed the accident, so people reached a conclusion about the possible cause of the accident.
A. alternative
B. brilliant
C. petent
D. tentative
网友回答
A. alternative
B. brilliant
C. petent
(答案→)D. tentative
解析:词义辨析。Alternative两者择一的;brilliant杰出的;petent有能力的;tentative试探性的,假设的。没有人目睹事故,所以人们只能对事故的可能起因得出假设性的结论。选D。