◎ 题干
I am delighted _____ as chairman of the students' union last winter.
[     ]
A. to appoint
B. to be appointed
C. to have appointed
D. to have been appointed
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“I am delighted _____ as chairman of the students' union last winter. [ ]A. to appoint B. to be appointed C. to have appointed D. to have been appointed …”主要考查了你对  【不定式的完成式】【不定式的被动式】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。