A. Napoleon was been kept on the island of Saint Helena by England.
B. Napoleon had kept on the island of Saint Helena by England.
C. Napoleon kept on the island of Saint Helena by England.
D. Napoleon was kept on the island of Saint Helena by England.
Feedback The Passive Voice is formed according to this rule: Subject - Be+ Past Participle - Preposition 'BY' - Agent (who or what carries out the action). The right form for the Past Simple Passive is: was/were + past participle or verb+ -ed