Question

I’m delighted _______ as chairman of the students’ union last winter

1. A.
   to appoint
2. B.
   to be appointed
3. C.
   to have appointed
4. D.
   to have been appointed

Answer 1

D
be +形容词后接不定式做结果状语又根据时间last winter可知是完成的动作所以选D。句意为：很高兴我去年当选为学生会主席。