EXERCISE 21 
    Computer are now being pushed into school.We know that multimedia will make __1_ easy and fun.Children will happily learn from __2_ characters while taught by expertly __3_ software.Who needs teachers when you have got __4_ education?These expensive toys are difficult to use in the classroom and __5_ extensive teacher training.Sure,kids love video games---__6_ think of you own experience:can you __7_ even one educational filmstrip of many years ago?I'll __8_ you remember the two or three great teachers who made a __9_ in your life.
    Then there is cyberbusiness.We are promised _10__ catalog shopping---just point and click for great deals.We'll order airline tickets _11__ the network,book restaurants and negotiate sales _12__.Stores will become obsolete.So how come my local mall does more __13_ in an afternoon than the entire Internet __14_ in an month?Even if there were a trustworthy way to __15_ money over the Internet,the network is __16_ a most essential ingredient of trade and commerce:salespeople. 
    What's absent from this electronic wonderland?People contact.Computers and networks __17_ us from one another.A network chat line is a limp __18_ for meeting friends over coffee.No interactive multimedia display comes __19_ to the excitement of a __20_ concert.This virtual reality where frustration is legion and where---in the holy names of Education and Progress---important aspects of human interactions are relentlessly devalued.

1)    A  schoolwork    B exercise         C teamwork   D research

2)    A  stimulated     B animated        C developed   D interested

3)    A  guided        B prepared        C tailored      D sold

4)    A computer-aided                    B computer-presented
       C computer-designed               D computer-developed

5)    A  promise       B introduce        C encourage   D require

6)    A  but           B just             C and        D therefore

7)    A  appreciate     B recall            C comment   D produce

8)    A  recommend    B guess            C bet        D urge

9)    A  result         B mark            C impression  D difference

10)   A  immediate     B free             C versatile    D instant

11)   A  over          B with             C by         D in

12)   A  decisions      B agreements       C contracts    D plans

13)   A  communication  B commerce       C business    D program

14)   A  reserves        B handles         C subscribes   D transmits

15)   A  mail          B deposit           C send       D save
 
16)   A  missing       B disappearing       C expelling    D retaining
 
17)  A  dismantle      B confine           C discriminate  D isolate
 
18)   A  occasion      B substitute         C change      D compromise
 
19)   A  near          B up              C close        D back
 
20)   A  life           B alive            C living        D live
 
 
 
参考答案：
1--5  ABCAD       6--10  ABCDD       11--15   ACCBC       16--20   ADBBD