At no time the rules of the game. It was unfair to punish them.A. they actually brokeB.

问题补充：

At no time the rules of the game. It was unfair to punish them.

A. they actually broke

B. do they actually break

C. did they actually break

D. they had actually broken

答案：

A. they actually broke

B. do they actually break

(答案→)C. did they actually break

D. they had actually broken

解析：C考查倒装。句意：实际上他们从未违反比赛规定，惩罚他们不公平。题干中表示否定意义的At no time置于句首，句子应该部分倒装，又根据题干中的was可排除B项，故答案为C项。