问题补充:
Once in the exam, the students who’ve done it would be punished.
A. caught cheated
B. catching cheating
C. being caught cheating
D. caught cheating
答案:
A. caught cheated
B. catching cheating
C. being caught cheating
(答案→)D. caught cheating
解析:考查固定结构。Catch sb doing sth抓住某人正在做某事。the students与catch构成被动关系,使用过去分词的形式。结合句意可知D正确。句意:一旦考试作弊的学生被抓住,这些学生会被惩罚。