题目选项分析

Shoppers in sporting goods stores, unlike those in department stores, do very little impulse shopping, do not buy a pair of skis and a boomerang when they come in for a basketball, but leave with only a basketball.

Shoppers in sporting goods stores, unlike those in department stores, do very little impulse shopping; someone who comes in for a basketball will leave with a basketball only and not buy a pair of skis and a boomerang as well.