--- You look happy today. Is there anything good?
--- I’m very delighted as one of the exchange students.
A. to choose
B. to have been chosen
C. choosing
D. having been chosen
网友回答
A. to choose
(答案→)B. to have been chosen
C. choosing
D. having been chosen
解析：本题考查非谓语动词。be delighted to do高兴做某事，根据题意，事情已经发生，故用不定式的完成时态，选B。