John has really got the job because he showed me the official letter_________him it.
A.offered B.offering C.to offer D.to be offered
选 B
解析：考查非谓语动词的用法.
在句中,现在分词短语“offering him it”作后置定语修饰letter,
相当于一个定语从句“which offered him it”,故选B项.为什么不能用offered,表被动，（信是被给）offer sb sth 因为在这里是这封信给他提供了这个工作，是主动关系。