1 . After taking into account other risk factors for cancer such as age, weight, physical activity, and fat intake, the authors found those consuming high amounts of artificial sweetener had a higher cancer occurrence rate _______ non-consumers. (用适当的词填空)

2 . In fact, the discontent is not useless since you may learn more from it ________ from the things that cheer you up. （用适当的词填空）

3 . My nephew Sam has collected comic books since he was five. Now he has more ________ two hundred of them. （用适当的词填空）