Mr．Smith was very glad as the manager of the pany．
A. being appointed
B. having appointed
C. to have appointed
D. to have been appointed
网友回答
A. being appointed
B. having appointed
C. to have appointed
(答案→)D. to have been appointed
解析：考查不定式用法。不定式可以放在形容词后面起解释说明的作用，如果是已经完成的事情，使用完成式。句意：Mr Smith很高兴被任命为公司的经理。根据句意使用被动语态，而且是已经发生的事情。使用不定式完成式的被动形式，故D正确。