About ten men in every hundred suffer from color blindness in some way. Women are luckier; only about one in two hundred is affected in this matter. Perhaps, after all, it is safer to be driven by a woman!

There are different forms of color blindness. In some cases a man may not be able to see deep red. He may think that red, orange and yellow are all shadows of green. Sometimes a person cannot tell the difference between blue and green. In rare cases an unlucky man may see everything in shades of green - a strange world indeed.

Color blindness in human beings is a strange thing to explain. In a single eye there are millions of very small things called “cones”. These help us to see in a bright light and to tell difference between colors. There are also millions of “rods”, but these are used for seeing when it is near dark. They show us shape but no color.

Some insects have favorite colors. Mosquitoes prefer blue to yellow. A red light will not attract insects, but a blue lamp will. In a similar way human beings also have favorite colors. Yet we are lucky. With the aid of the cones in our eyes we can see many beautiful colors by day, and with the aid of the rods we can see shapes at night. One day we may even learn more about the invisible colors around us.

1. The passage is mainly about _____________.

   A. color and its surprising effects.            B. women being luckier than men

   C. danger caused by color blindness          D. color blindness

2. According to the passage, with the help of the “cones”, we can_______________.

   A. tell different shapes                    B. see in a weak light

   C. kill mosquitoes                        D. tell orange from yellow

3. Why do some people say it is safer to be driven by women?

A. Women are more careful.               B. There are fewer color-blind women

   C. Women are fonder of driving than men.    D. Women are weaker but quicker in thinking.

4. Which of the statements about the color- blind is true?

   A. Not all of them have the same problem in recognizing color.

   B. None of them can see deep red.

   C. None of them can tell the difference between blue and green.

   D. All of them see everything in shades of green.

5. We can attract and kill mosquitoes by using a _____________.

   A. red light       B. yellow light          C. blue light        D. green light

短文改错(共10小题;每小题1分,满分10分)

此题要求改正所给短文的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上划一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

该行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。

该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的不要改。

Dear Helen,

Thank you so much for your party at Christmas Eve.All     76.__________

of them enjoyed it very much.We liked the dishes you had            77.__________

cooked but we were happy to learn the English songs you taught        78.__________

us.We hope you’ll teach us a lot many songs in the future.          79.__________

We’re leaving from our hometowns to spend the winter            80.__________

vacations.It seems that many of us are homesick after             81.__________

being away from home for such a longtime.What are your              82.__________

plans? Will you join in the tourist group organized by our school?        83.__________

We are busy prepare for our trips.Please excuse us               84.__________

for not able to say goodbye to you.             85.__________

We hope you’ll have a good time.

                                               Yours,

                                              Xiao Hua

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