1. She has great p       and will surely become very successful if

she is given the opportunity.                                  ___________

2.Some dogs are trained to help people who are v      impaired.      ___________

3. When we are learning new things, it is important to make use of

   p       knowledge.                                         ___________

4. There is no quick way of finding a cure for any disease; it is always

   a process of trial and e     .                                    ___________

5.It will take us an hour to get to the airport, a      for traffic delays.   ___________

6. If you try to look up every word you come across in a reading passage,

   you will soon get s      and it will slow down your reading.         ___________

7. Do as you are told to, o      you will be in real trouble.            ___________

8. He worked hard for a while, but e      he got tired of trying so hard.   __________

9. The food in this restaurant is delicious and the prices are r      .      __________

10. Parents should face the fact that most children are of a      intelligence. __________

A team of US psychologists have found that talking to another person for ten minutes a day helps with memory.
"Socializing is just as effective as more traditional kinds of mental exercise in boosting memory and intellectual performance," Oscar Ybarra, a psychologist at the University of Michigan Institute for Social Research, said in a statement.
In one investigation, they analyzed data on 3610 people, aged 24 to 96.
They found that the higher their level of social interaction (交流), the better their cognitive (认知的) functioning.  Social interaction includes getting together or having phone chats with relatives, freinds and neighbors.
In another experiment, the researchers conducted lab tests on 76 college students, aged 18 to 21, to evaluate how social interactions and intellectual exercises affected the results of memory and mental performance tests.
The students were divided into three groups: the social interaction group had a discussion of a social issue for 10 minutes before taking the tests; the intellectual activities group completed three tasks (including a reading comprehension exercise and a crossword puzzle) before the tests; and a control group (对照组) watched a 10-minute clip (电源片段) of the Seinfeld television show.
"We found that short-term social interaction lasting for just 10 minutes improved participants’ intellectual performance as much as engaging in so-called ’intellectual’ activities for the same amount of time," Ybarra said.
The study was expected to be published in the February issue of the journal Personality and Social Psychology Bulletin.
【小题1】The underlined word "boosting" in the second paragraph can be replaced by ______.

 “I don’t understand what you are saying,” she said, with a _____ expression on her face.

A. puzzling   B. puzzled   C.  puzzle   D. puzzlement

Ants have a reputation for strength,organization and teamwork.But researchers have now discovered that a key secret to the success of ants is their ability to identify the importance of age in the work place.

A study of Gentral American leaf-cutter ants has shown that the younger and stronger members are give the toughest job of cutting therough the leaves they harvest.Their sharp youn teeth do this job effectively,but as they get older their teeth become relatively worn and blunt.

But rather than being retired or abandoned by the group,the ageing ants are given a new role more suyted to their physical abilities.They become carriers and teansport the leaves back to the kingdom where they are harvested for food.

The findings by researchers from the University of Oregon and the Oregong State University support previous research showin the survival of a leaf-cutter kingdom depends on the efficiency(效率）of is workers.

“Cuting leaves is hard work,”said Dr.Robert Schofield,who led the research team.“Much of the cutting is done with a V-shaped blade(刀片）between teeth on their jaws.This blade starts out as sharp as the sharpest razor blade that humans have developed.”But over rime the teeth become blunter and the cutting job slows down.The team estimated that,because of this age-related wear,a colony(蚁群)spent twice the energy cutting leaves than it would if all the ants had sharp blades.Its findings support the idea that wear and break can be significant problems for insects as well as largre animals.

Like humans,leaf-cuttre ant recognize that older members of the group can still make a worhwhile contribution to society.“This study shows an advantage of social living that we are familiar with,”said Dr.Schofield.

1.The younger and stronger ants do the toughest job because      .

2.The undrelined word“blunt”in the second paragraph can be replaced by      .

3.What happens to the ants when they become old?

4.It can be learned from the passage that       .

5.What can be the best title for the passage?

V. 单词拼写（10×1）
1. He is seen as a ________ (潜在的) leader of our party.
2. We will _____（任命） him as your secretary, for his carefulness.
3. Because of _______（采用） the new teaching methods, the students feel at easy to study.
4. They have made a _______（灵活的） holiday plan to satisfy everyone.
5. It is against my will if I _______（反对） you.
6.In summer, fruit _____ （易于）to decay, so you had better not to buy so much at one time.
7. People  don’t listen to him, for he is always ________（神经兮兮）.
8. You should make a _______（具体的） analysis on the problem.
9. Some officials should not ______ （滥用）their authority.
10. Under the _____（压力） of life, he had to go abroad.