试题题干
Word Formation
Complete the following sentence with the proper form of the word in the bracket.
(involve) Evidence of practical 
in the subject is required and is normally determined by the submission of a portfolio of work at interview.
参考答案
试题解析
此处缺少名词。
practical是形容词，形容词修饰名词。所以变involve为名词involvement。
句意：要求提供实际参与主题的证据，通常通过在面试时提交代表作品集来确定。