The teacher called Tom to his office because he was caught in the exam.A. to cheatB. cheat

问题补充：

The teacher called Tom to his office because he was caught in the exam.

A. to cheat

B. cheating

C. cheated

D. cheat

答案：

A. to cheat

(答案→)B. cheating

C. cheated

D. cheat

解析： 考查非谓语动词。主语he和cheat是主谓关系，且表示被抓时正在作弊，所以用cheating表主动和正在进行。选B。