第9题: [单项选择]The police thought that piece of evidence was ______ early in the investigation, but it turned out to be Vital in convicting the man of murder. A. insignificant B. important C. unsuitable D. essential 参考答案:A 答案解析:[解析] 本题是词义辨析题。 [详细解答] 根据句意,有一个转折,即but前应指出该证物不是很vital,这样,应确定用词应是不显要之意。unsignificant表示不重要的,不紧要的