Customer loyalty programs are attempts to bond customers

to a company and its products and services by offering

incentives – such as airline frequent flyer programs or special

credit cards with valuable benefits – to loyal customers.

In support of loyalty programs, companies often invoke the

"80/20" principle, which states that about 80 percent of revenue

typically comes from only about 20 percent of customers.

However, this profitable 20 percent are not necessarily loyal

buyers, especially in the sense of exclusive loyalty. Studies

have demonstrated that only about 10 percent of buyers for

many types of frequently purchased consumer goods are 100

percent loyal to a particular brand over a one-year period.

Moreover, 100-percent-loyal buyers tend to be light buyers

of the product or service. "Divided loyalty" better describes

actual consumer behavior, since customers typically vary the

brands they buy. The reasons for this behavior are fairly

straightforward: people buy different brands for different occasions or for variety, or a

brand may be the only one in stock or may offer better value because of a special deal.

Most buyers who change brands are not lost forever; usually, they are heavy consumers

who simply

(35) prefer to buy a number of brands. Such multi-brand loyalty means that one

company's most profitable customers will probably be its competitors' most profitable

customers as well.

(40) Still, advocates of loyalty programs contend that such programs are beneficial

because the costs of serving highly loyal customers are lower, and because such loyal

customers are less price sensitive than other customers. It is true that when there are

start-up costs, such as credit checks, involved in serving a new customer, the costs exceed those of serving a repeat customer. However, it is not at all clear why the costs of serving a highly loyal customer should in principle be different from those of serving any other type of repeat customer. The key variables driving cost are size and type of order, special versus standard order, and so on, not high-loyalty versus divided-loyalty customers. As for price sensitivity, highly loyal customers may in fact come to expect a price discount as a reward for their loyalty.

33: The primary purpose of the passage is to

A: question the notion that customer loyalty programs are beneficial

B: examine the reasons why many customers buy multiple brands of products

C: propose some possible alternatives to customer loyalty programs

D: demonstrate that most customers are not completely loyal to any one brand of product or service

E: compare the benefits of customer loyalty programs with those of other types of purchase incentive programs

我选的是A, TS的同义变换

34: missing

35: missing

36: missing

同意，但是其实a的表达对于这篇文章来说并不算最好的，可是选无可选，只有选这个了～

请问or a brand 的主词是people buy吗？
就是说这句是people buy a brand may be the only one in stock or may offer better value because of a special deal.

请问buy 是动词,后面又有一个may be,看不懂文法..

这句翻译：人们买一个品牌,也许是现货的唯一一个，(所以才会只买该品牌)，或许该品牌提供特价,因为特殊交易(如折扣)

快考试了，请大家解救..谢谢