28、________ the text a second time, the meaning will become clearer to you．

A．Read               B．Reading                  C．If reading                D．When you read

26、________ an English-Chinese dictionary.

A．The students each have               B．The students each has

C．Each the students has                 D．Each of the students have

25、Everyone should learn from ________ Lei Feng and try to be ________ Lei Feng.

 A．/, a        B．/, /         C．the, the         D. /, the

24、-How did you pay the workers?

-As a rule, they were paid ________.

A．by hour        B．by the hour       C．by an hour        D. by hours

21、[1] Look at the center circles of Diagram A and Diagram B．Which of the centre circles looks larger?

[2] Take a first look and you probably think that the centre circle in Diagram A is smaller than that in Diagram B．In fact，they are exactly the same size．

  [3]Then look at the picture on the right．What do you see? A vase? Or two faces? Does the picture change quickly from one to the other again and again? Maybe or maybe not，but you can never see them at the same

time．

  [4]“What’s happening? Is something wrong with my eyes?” You may wonder at what you see．Don’t worry．Here is how it goes：

  [5]When we look at things，our eyes send messages to our brains and then our brains interpret（解释）the information．However，sometimes our brains interpret the received information in a wrong way．It seems that our eyes are playing a joke on us．This often happens and we call it“Visual illusion（幻觉）”．  

  [6] Movie makers often make use of illusions．They make the objects around actors much smaller or bigger than usual．This makes us believe that the actors are much larger or smaller than they usually are．The movies Jurassic Park and Honey J shrunk the kids just make use of illusions． 

1．In which column（栏目）of a magazine can you read the above text?

    A．Culture．             B．Science．            C．Humour．              D．Education．

2．The centre circle in Diagram A looks smaller than that in Diagram B．That’s

    because                     ．

    A．something is wrong with our eyes

    B．the two circles are not of the same size

    C．our brains interpret the information wrongly

    D．pictures change quickly from one to the other

3．In the picture on the right，it seems that Line AB is shorter than lane CD，but in fact lane AB is as long as Line CD．Which paragraph can explain what has happened to our eyes?

   A．The second one．                B．The third one．

   C．The fifth one．                       D．The sixth one．

4．What’s the right order according to the text?

   a．We look at things with our eyes．

   b．Our brains interpret the messages．

   c．Our brains tell us what we have seen．

   d．Our eyes send messages to our brains．

   A．a-d-b-c           B．c-a-b-d           C．a-c-d-b               D．b-e-a-d

5．Movie makers make use of visual illusions to               ．

   A．help the actors look better

   B．make the actors much braver

   C．help the actors become stronger

   D．make the actors seem different in size

19、—I wonder why Tom left without a word.

—He          have had some trouble，for he looks dull．

A．should          B．must             C．can           D．could