A.不要伤害宠物。
B.卖宠物赚钱。
C.从宠物店买宠物。
D.把宠物当作家庭成员。
根据最后一段First, buy a pet at a pet shop. Make sure it is healthy. If not, take it to the doctor for a treatment. Second, share enough time, care and love with your pet. Because it's one of your family members. Third, never hurt your pet.(首先,在宠物店买一只宠物。确保它是健康的。如果不是,就去看医生治疗。第二,与你的宠物分享足够的时间,关心和爱。因为它是你的家庭成员之一。第三,永远不要伤害你的宠物。)可知,A/C/D三项文中均有提到,B未提到,故选B。