People diet to look more attractive. Fish diet to avoid being beaten up, thrown out of their social group, and getting eaten as a result. That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists.

The research team have discovered that subordinate fish voluntarily diet to avoid challenging their larger competitors. “In studying gobies we noticed that only the largest two individuals, a male and female, had breeding(繁殖) rights within the group," explains Marian Wrong. “All other group members are nonbreeding females, each being 5-10% smaller than its next largest competitor. We wanted to find out how they maintain this precise size separation."

The reason for the size difference was easy to see. Once a subordinate fish grows to within 5-10% of the size of its larger competitor, it causes a fight which usually ends in the smaller goby being driven away from the group. More often than not, the evicted fish is then eaten up.

It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish. Whether they did so voluntarily, by restraining how much they ate, was not clear. The research team decided to do an experiment. They tried to fatten up some of the subordinate gobies to see what happened. To their surprise, the gobies simply refused the extra food they were offered, clearly preferring to remain small and avoid fights, over having a feast.

 The discovery challenges the traditional scientific view of how boss individuals keep their position in a group. Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves, so keeping their competitors small.

While the habits of gobies may seem a little mysterious. Dr. Wong explains that understanding the relationships between boss and subordinate animals is important to understanding how hierarchical(等级的) societies remain stable.

The research has proved the fact that voluntary dieting is a habit far from exclusive to human.”As yet, we lack a complete understanding of how widespread the voluntary reduction of food intake is in nature," the researchers comment. “Data on human dieting suggests that, while humans generally diet to improve health or increase attractiveness, rarely does it improve long-term health and males regularly prefer females that are fatter than the females' own ideal."

65 When a goby grows to within 5-10% of the size of its larger competitor, it ______.

A. faces danger       B. has breeding rights

C. eats its competitor     D. leaves the group itself

66. The underlined words “the evicted fish" in Paragraph 3 refer to _____.

A. the fish beaten up       B. the fish found out

C. the fish fattened up     D. the fish driven away

67 The experiment showed that smaller fish ____.

A. fought over a feast        B. went on diet willingly

C. preferred some extra food  D. challenged the boss fish

68. What is the text mainly about?

A. Fish dieting and human dieting.

B. Dieting and health.

C. Human dieting.

D. Fish dieting. 

第二节 根据对话内容，从对话后的选项中选出能填在空白处的最佳选项。选项中有两项为多余选项。(AB=E, AC=F, AD=G)

—Mr. Paker, when did you arrive home yesterday evening?

— At about 8 o’clock.

—

—Well, I washed my hands and then watched sports news.

—

—At about 8:45, I guess.

—

Yes, I watched TV and went to sleep afterwards.

—

—Well, I think I was in the bath at that moment.

—

When did you have supper?

Did you go out to have a walk last night?

What did you do right after you entered your flat?

No, you were not. You robbed a bank in Main Street.

Did you stay at home all evening?

But your friends phoned you at nine, and you didn’t answer.

They tried many means to get in touch with you.

完形填空（共20小题，每题1．5分，共30分）

       A White – bearded ancient man was walking over the hills and valleys of the world．On his back he carried a bag which moved uneasily as if something was trying to escape from it, but he   21   it between his shoulders and walked on．

       He was Father Time, traveling forever, and the bag he   22   was filled with Tomorrows, all struggling to get out．

       Each   23   at twelve o’clock, he opened the bag and   24   a Tomorrow, just one, with its wings of   25   , and its shining feathers rose with hope．All the rest were kept   26   by Time’s strong hands and pushed   27   in the bag．

       Down flew the Tomorrow   28   its lovely feathers, but as it touched the   29   , off fell its blue wings and it changed to a（n）   30   white bird which could not fly．It had become a Today．Everyone knows that Today isn’t as   31   as Tomorrow, for Today can be held in one’s   32   , accepted, unloved, but Tomorrow is full of mystery（神秘）and beauty．It is   33   by all the world．Even those with   34   hope sigh, “Tomorrow may bring a（n）   35  ．Tomorrow’s life will be different．”

       Everybody tried to   36  the Tomorrow before it fell to the ground．They thought if they   37   beforehand what the Tomorrow carries, they could   38   for it．So they put great nets on the trees, seeking to catch one   39   it changed his feather．Yet although they tried every means, the birds   40   and flew to the ground as Todays．

1.A．relaxed  B．worried    C．excited     D．settled

2.A．bore      B．placed      C．laid   D．lifted

3.A．dawn     B．morning   C．night D．afternoon

4.A．got     B．fetched     C．took      D．flew

5.A．blue      B．pink      C．black     D．white

6.A．out     B．off        C．away     D．back

7.A．along     B．deep      C．far        D．over

8.A．shaking  B．moving     C．beating     D．striking

9.A．earth     B．floor     C．tree       D．grass

10.A．lovely  B．ordinary   C．beautiful   D．especial

11.A．bad      B．wonderful C．common   D．familiar

12.A．hands   B．mind     C．heart     D．head

13.A．noticed       B．seen      C．forgotten  D．desired

14.A．little    B．some     C．much     D．few

15.A．shock   B．suggestion C．change      D．advice

16.A．keep    B．catch     C．hold      D．protect

17.A．expectedB．watched  C．guessed     D．knew

18.A．wait     B．long      C．prepare     D．look

19.A．as     B．when     C．before      D．after

20.A．refused       B．escaped     C．struggled  D．fought

完形填空（共20小题，每题1．5分，共30分）

       A White – bearded ancient man was walking over the hills and valleys of the world．On his back he carried a bag which moved uneasily as if something was trying to escape from it, but he   21   it between his shoulders and walked on．

       He was Father Time, traveling forever, and the bag he   22   was filled with Tomorrows, all struggling to get out．

       Each   23   at twelve o’clock, he opened the bag and   24   a Tomorrow, just one, with its wings of   25   , and its shining feathers rose with hope．All the rest were kept   26   by Time’s strong hands and pushed   27   in the bag．

       Down flew the Tomorrow   28   its lovely feathers, but as it touched the   29   , off fell its blue wings and it changed to a（n）   30   white bird which could not fly．It had become a Today．Everyone knows that Today isn’t as   31   as Tomorrow, for Today can be held in one’s   32   , accepted, unloved, but Tomorrow is full of mystery（神秘）and beauty．It is   33   by all the world．Even those with   34   hope sigh, “Tomorrow may bring a（n）   35  ．Tomorrow’s life will be different．”

       Everybody tried to   36  the Tomorrow before it fell to the ground．They thought if they   37   beforehand what the Tomorrow carries, they could   38   for it．So they put great nets on the trees, seeking to catch one   39   it changed his feather．Yet although they tried every means, the birds   40   and flew to the ground as Todays．

A．relaxed  B．worried    C．excited     D．settled

A．bore      B．placed      C．laid   D．lifted

A．dawn     B．morning   C．night D．afternoon

A．got     B．fetched     C．took      D．flew

A．blue       B．pink      C．black     D．white

A．out     B．off        C．away     D．back

A．along     B．deep      C．far        D．over

A．shaking  B．moving     C．beating     D．striking

A．earth      B．floor     C．tree       D．grass

A．lovely  B．ordinary   C．beautiful   D．especial

A．bad      B．wonderful C．common   D．familiar

A．hands   B．mind     C．heart     D．head

A．noticed B．seen      C．forgotten  D．desired

A．little    B．some     C．much     D．few

A．shock   B．suggestion C．change      D．advice

A．keep    B．catch     C．hold      D．protect

A．expectedB．watched  C．guessed     D．knew

A．wait     B．long      C．prepare     D．look

A．as     B．when     C．before      D．after

A．refused B．escaped     C．struggled  D．fought

One day a heavy storm hit a village. Nothing was ____41____ but a rock fell from the nearby mountain. The rock rolled down from the mountain and __42_____ in the middle of the main oad in the village. It was very big and shaped more or less __43__ a ball. The villagers decided to move it away since it was blocking the street. Several of the ___44___ men came to try to lift it out of the road. No matter _____45____ they tried, they couldn’t move it.
All of this time a young boy was ___46_____ the men trying to move the rock.. “Excuse me,” he said, “but I think I could move it.” “You,” they shouted, “____47___ are you talking about? All of us have just tried and can’t ___48_____ move it a little.” They all ____49______ the boy.
The next ___50_____ some villagers came to the street. To their great __51____, the rock was gone. More people ran out to see for themselves. It was true the rock was not in the road any more. The little boy stood in the street, smiling, “ I told you I could move it. I did it last night.” ___52_____ he walked over to ___53____ the rock had been and ____54_____ some dirt with a shovel( 铲 ) “You see,” he said, “ I dug a hole __55____ the rock and it rolled down into the hole by itself. Then I covered it with dirt.”