a student is found cheating in the exam he will not escape from being punished.A. WhileB.

问题补充：

a student is found cheating in the exam, he will not escape from being punished.

A. While

B. Though

C. Until

D. Once

答案：

A. While

B. Though

C. Until

(答案→)D. Once

解析：句意：一旦一个学生被发现考试作弊，他不会逃脱被处罚的。A. While当…时候，虽然，尽管，B. Though虽然，C. Until直到， D. Once一旦，选D。