The boy was caught in the examination and was punished by the teacher.A. having cheatedB.

问题补充：

The boy was caught in the examination and was punished by the teacher.

A. having cheated

B. cheated

C. cheating

D. cheat

答案：

A. having cheated

B. cheated

(答案→)C. cheating

D. cheat

解析：考查现在分词做主语补足语：句意：男孩被抓住考试作弊，被老师惩罚。Catch sb doing是抓住某人正在做…，这里是被动式：Sb be caught doing，现在分词做的是主语补足语，选C。