Researchers believe that the insect(昆虫) is better at managing congestion (拥挤) than humans. Ants are the most many type of animal on earth with brains that contain about 250,000 cells ---- the largest among insects.

Now an intelligence expert Dr. Dirk Helbing says understanding more about ants could help solve one of the headaches of modern life -- road congestion.

His team set up an "ant motorway" with two routes of different widths from the nest to some sugar syrup (糖浆). Soon the narrower（更窄的） route soon became crowded（拥挤的）. But when an ant returning along the crowded route to the nest met with another ant just starting out, the returning ant pushed the newcomer onto the other path. However, if the returning ant had enjoyed a trouble-free journey, it did not send the newcomer in a different direction.

The result was that just before one route became clogged , the ants had turned to another route and traffic jams never formed.

The researchers also created a computer model of more complex ant networks with routes of different lengths. The team found that even though ants being sent in another direction sometimes took a longer route, they still got to the food quickly and efficiently.

Dr. Helbing, of the Dresden University of Technology in Germany, said that while you cannot allow cars to meet with traffic coming in the opposite（相反的）direction as a form of traffic control, you could do the next best thing and allow them to communicate.

His plan is to force cars traveling in one direction to tell oncoming traffic what the conditions they are about to meet with-- so they can avoid that situation if necessary.

The first paragraph suggests that _______.

A. ants have a special way to manage congestion

B. ants are clever and good at dealing with the traffic jams because of developed brain

C. insects are similar to animals in dealing with the traffic jams because of developed brain

D. insects have more advantages than humans

The underlined word "clogged" can be replaced by _______ in the following four words.

A. cleaned         B. narrowed          C. crowded               D. shortened

If an ant returns along crowded route to the nest, how does the ant solve the traffic problem?

A. The ant will change the direction of its own.

B. The ant stopped the newcomer from moving ahead and forced the newcomer to wait there patiently.

C. The ant can't direct the newcomer.

D. The ant will push the newcomer to the other route, so traffic jams won't form.

What's the advice that Dr. Helbing gives us?

A. The cars cannot be allowed to communicate with traffic coming in the opposite direction.

B. The cars can communicate with traffic in the same direction.

C. The cars that travel in one direction can tell oncoming traffic about the traffic conditions.

D. We should build more routes of different lengths and widths.

—— Why? Tom, your shirt is so dirty!

  —— Mum, I ＿＿＿＿＿ my storeroom downstairs。

A. cleaned      B. have worked  C. was cleaning     D. have been cleaning

第三节完形填空(共20小题；每小题1.5分，满分30分)
James’s New Bicycle
James shook his money box again. Nothing! He carefully  26  the coins that lay on the bed. $24.52 was all that he had. The bicycle he wanted was at least $90!  27   on earth was he going to get the  28  of the money?
He knew that his friends all had bicycles. It was  29  to hang around with people when you were the only one without wheels. He thought about what he could do. There was no  30  asking his parents, for he knew they had no money to  31  .
There was only one way to get money, and that was to  32  it. He would have to find a job.  33   who would hire him and what could he do? He decided to ask Mr. Clay for advice, who usually had  34  on most things.
“Well, you can start right here,” said Mr. Clay. “My windows need cleaning and my car needs washing.”
That was the  35  of James’s odd-job(零工) business. For three months he worked every day after finishing his homework. He was amazed by the   36   of jobs that people found for him to do. He took dogs and babies for walks, cleared out cupboards, and mended books. He lost count of the  37  of cars he washed and windows he cleaned, but the   38  increased and he knew that he would soon have   39   for the bicycle he longed for.
The day   40  came when James counted his money and found $94.32. He   41  no time and went down to the shop to pick up the bicycle he wanted. He rode   42  home, hoping to show his new bicycle to his friends. It had been hard   43   for the money, but James knew that he valued his bicycle far more   44   he had bought it with his own money. He had   45  what he thought was impossible, and that was worth even more than the bicycle.
26. A. cleaned    B. covered       C. counted        D. checked
27. A. How        B. Why              C. Who             D. What
28. A. amount     B. part               C. sum               D. rest
29. A. brave       B. hard              C. smart              D. unfair
30. A. point          B. reason            C. result             D. right
31. A. cost          B. spend             C. spare             D. save
32. A. borrow      B. earn               C. raise               D. collect
33. A. Or           B. So                 C. For                D. But
34. A. decisions   B. experience      C. opinions         D. knowledge
35. A. beginning  B. introduction   C. requirement    D. opening
36. A. similarity  B. quality           C. ability            D. variety
37. A. brand       B. number           C. size               D. type
38. A. effort       B. pressure          C. money            D. trouble
39. A. all            B. enough          C. much             D. some
40. A. finally       B. immediately    C. normally         D. regularly
41. A. gave         B. left                       C. took               D. wasted
42. A. patiently    B. proudly          C. silently          D. tiredly
43. A. applying   B. asking            C. looking          D. working
44. A. since         B. if                  C. than               D. though
45. A. deserved    B. arrived           C. achieved         D. learned

--- Why? Tom, your shirt is so dirty!

    --- Mum, I ______ my storeroom downstairs.

    A. cleaned                   B. have cleaned

    C. was cleaning              D. have been cleaning

James shook his money box again. Nothing! He carefully   36  the coins that lay on the bed. $24.52 was all that he had. The bicycle he wanted was $90!  37   on earth was he going to get the   38  of the money? He knew that his friends all had bicycles. It was   39  to hang around with people when you were the only one without wheels. He thought about what he could do. There was no   40   to ask his parents, for he knew they had no money to  41  . There was only one way to get money, and that was to   42   it. He would have to find a job.  43   who would hire him and what could he do? He decided to ask Mr Clay for advice, who usually had    __44  in most things. "Well, you can start right here," said Mr Clay. "My windows need cleaning and my car needs washing." That was the  45  of James’s odd-job (零工) business. For three months he worked every day after finishing his homework. He was surprised by the  46   jobs that people found for him to do. He took dogs and babies for walks, cleared out cupboards, and mended books. He lost count of the   47  of cars he washed and windows he cleaned, but the  48  increased and he knew that he would soon have  49  for the bicycle he was dying for. The day   50   came when James counted his money and found $94.32. He   51  no time and went down to the shop to pick up the bicycle he wanted. He rode   52   home, looking forward to showing his new bicycle to his friends. It had been hard   53  for the money, but James knew that he valued (重视) his bicycle far more 54   he had bought it with his own money. He had   55  what he thought was impossible, and that was worth even more than the bicycle.

A. cleaned                  B. covered            C. counted                          D. checked

A. How                   B. Why                C. Who                              D. What

A. amount                 B. part                  C. sum                               D. rest

A. brave                    B. hard                  C. smart                                    D. unfair

A. need                     B. reason              C. result                                    D. right

A. separate                B. spend               C. spare                              D. save

A. borrow              B. earn              C. raise                               D. collect

A. Or                        B. So                   C. For                                D. But

A. decisions               B. experience               C. opinions                         D. knowledge

A. beginning             B. introduction      C. requirement                    D. opening

A. similar                  B. ashamed           C. peaceful                         D. various

A. brand                   B. number            C. size                                D. type

A. effort                   B. pressure            C. money                            D. trouble

A. all                        B. enough             C. much                            D. some

A. finally                  B. instantly           C. normally                        D. regularly

A. gave                     B. left                  C. took                               D. wasted

A. patiently                      B. proudly            C. silently                           D. tiredly

A. applying             B. asking              C. looking                          D. working

A. since                    B. if                     C. than                               D. though

A. deserved               B. studied             C. achieved                         D. learned