试题题干
Word Formation
Complete the following sentence with the proper form of the word in the bracket.
(evident) There is convincing 
of a link between exposure to sun and skin cancer.
参考答案
试题解析
此处缺少名词。
convincing是形容词，形容词修饰名词。所以变evident为名词evidence。
句意：在阳光下曝晒和皮肤癌之间的关系有着很明确的证据。