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A.    Huge retailers force producers to cunt costs

B.    Consumers like supermarkets

C.    Technology helps reduce food prices

D.    Food comes cheaper in larger portions

E.    Chain stores provide better service

F.    Bigger supermarkets offer lower prices

27.  Big supermarkets can offer food at lower prices because they can buy in___

28.  Some food  producers have reduced___

29.  Besides cutting its workforce, unilever also abandoned its___

30.  Buyers like bigger portion because they think they have got___

A.    their workforce

B.    huge portions

C.    large quantities

D.    their money

E.    a good barging

F.    minor brands

答案：

23．C  technology helps reduce food prices

24.  F  bigger supermarkets offer lower prices

25.  A. Huge retailers force producers to cut costs

26．D． food comes cheaper in larger portions

27.   Big supermarkets can offer food at lower prices because they can buy ___.

答案为C: in bulk  = in large quantities

28.  Some forced producers have reduced ___

答案为F。minor brands

29．Besides cutting its cost, Unilever also abandoned its  ____

答案为A. their workforce 

30．Buyers like big portions because they think they have got ___.

答案为E。a good bargain = a better deal

第四部分：阅读理解（第31~45题，每题3分，共45分）

下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。

第一篇

DNA testing

31.  What is the main idea of this passage?

A.    DNA testing has changed the American legal system.

B.    DNA testing has helped innocent men go free in Illinois.

C.    DNA testing uses genetics to identify a person.

D.    DNA testing has played a key role in criminal investigation.

32.  DNA testing was first used in a criminal case by

A.    a lawyer in New York

B.    students in Illinois

C.    doctors in the United States

D.    police in Great Britain

33.  The innocence project uses DNA testing to

A.    set free innocent prisoner

B.    help the police put people in prison

C.    find out which lawyer are incompetent

D.    prove that suspects are