2. 外语
  3. A. abuse B. award C. badly D. compliments E. correlation F. expressive G. generously H. institutionalized I

A. abuse B. award C. badly D. compliments E. correlation F. expressive G. generously H. institutionalized I

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问题    A. abuse    B. award     C. badly      D. compliments  E. correlation
   F. expressive   G. generously   H. institutionalized  I. practice    J. rated
   K. replaced   L. reserved    M. reward     N. undermined   O. variability
   In America alone, tipping is now a $16 billion-a-year industry. A recent poll showed that 40% of Americans hate the 【C1】______. Tips should not exist. So why do they? The conventional wisdom is that tips both 【C2】______ the efforts of good service and reduce uncomfortable feelings of inequality. But according to new research from Cornell University, tipping no longer serves any useful functions.
   The paper analyses data from 2,547 groups dining at 20 different restaurants. The 【C3】______ between larger tips and better service was very weak: only a tiny part of the 【C4】______ in the size of the tip had anything to do with the quality of service. Customers who【C5】______a meal as "excellent" still tipped anywhere between 8% and 37% of the meal price.
   Tipping is better explained by culture than by economics. In America, the custom has become 【C6】______: it is regarded as part of the accepted cost of a service. In a New York restaurant, failing to tip at least 15% could well mean 【C7】______ from the waiter. Hairdressers can expect to get 15-20%, the man who delivers your groceries $2. In Europe, tipping is less common; in many restaurants, discretionary (任意的)tipping is being 【C8】______ by a standard service charge. In many Asian countries, tipping has never really caught on at all.
   How to account for these national differences? According to Michael Lynn, the Cornell paper’s co-author, countries in which people are more extrovert (外向的), sociable tend to tip more. And, says Mr. Lynn, "in America, where people are outgoing and 【C9】______, tipping is about social approval. If you tip 【C10】______ people think less of you." Icelanders, by contrast, do not usually tip—a measure of their introversion, no doubt.
【C2】
选项
答案M
解析 空格处需填入及物动词作谓语，时态与并列谓语reduce保持一致。词库中reward“奖励(行动、品质等)”，可与efforts搭配，填入句子意为“小费奖赏优质服务”，符合文意，故选M。award通常指官方或组织机构把钱财或奖项颁发给某人，如award sb．the first prize“授予某人一等奖”，此处语境使用award不恰当，故排除。
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