题干
--- You look happy today. Is there anything good?
--- I’m very delighted ______ as one of the exchange students.
--- I’m very delighted ______ as one of the exchange students.
A：to choose
B：to have been chose
C：choosing
D：having been chose
答案(点此获取答案解析）
B
，则
的最小值是（ ▲ ）
