题干
It's generous __ ___ them to donate money to UNICEF. They think it important _____ them to help poor children go to school.
A：to; for
B：for; of
C：of; to
D：of; for
答案(点此获取答案解析）
D
个同类产品（其中
个是正品，
个是次品）中任意抽取
个的必然事件是（ ）
