New Year's, Christmas and birthdays are occasions to buy new outfits and ( ) old ones.

　　A.discard

　　B.dissipate

　　C.cancel

　　D.conceal

　　【答案】A。A 项：抛弃、放弃;B 项：浪费、驱散;C 项：取消、删去;D 项：隐瞒、隐藏。句意：新年、圣诞节和生日是购买新服装，抛弃旧衣物的时机。故本题正确答案选 A。