Gray hair is simply a part of the normal aging process, and the rate you go silver is genetically predetermined. Going gray is not associated with earlier death, and premature graying is not, generally speaking, a sign of an illness or ill health in younger adults. There are, however, some specific health conditions associated with gray or white hair, but for most of us, going gray is just a fact of life.

Hair color comes from the pigment melanin(黑色素), which determines your individual shade. Hair without any melanin is pure white. The pigment is produced in cells called melanocytes, which inject pigment into the hair. At some point in everyone's lifetime, these cells slow down and eventually stop producing color. Scientists have yet to identify the exact mechanism by which melanocyte cell death occurs.

A study of more than 4,000 women and men from 20 countries determined that about 75% of people between the ages of 45 and 65 have some gray hair. In general, people of European descent gray earliest followed by Asians and Africans. It's interesting to note that a lucky 1 in 10 has no gray hair by retirement age. Beginning at age 30, your chances of having gray hair go up 10-20% per decade.

It may feel like you have more grays after a stressful event, but that's probably because middle age is basically a series of anxiety-ridden events. Between working, raising kids, and caring for older parents, the "sandwich" years of 45-65 can be stressful, especially for women. They are also when we naturally start to look older.

At this point, there is still no silver bullet to keep away the grays.

1.What would be the best title for this passage?

A. Going gray.                   B. Tips to make hair color last

C. Why does hair turn gray?        D. Gray hair is in fashion.

2.Which of the following is a true statement according to the passage?

A. Scientists have found out how to prevent hair from turning gray.

B. Europeans are more likely to gray than Asians and Africans.

C. Gray hair means poor health or a sign of illness.

D. Everyone will inevitably get gray hair by retirement age.

3.Which is not among the reasons for hair turning gray according to the passage?

A. Being physically weak.         B. Stress from different sides.

C. Death of melanocyte cell.       D. Genetic factors.

4.What does “silver bullet” in the last paragraph probably mean?

A. Make-up     B. Scientific research.     C. Chemical weapon.     D. Cure.

阅读下列短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。

　　Besides this question of the time given to pronunciation，there are two other requirements for the teacher：the first，knowledge；the second，technique．

　　It is important that the teacher should be in possession of the necessary information．This can generally be go form books．It is possible to get from books some idea of the speech；and of what we call general phonetic rules．It is also possible in this way to get a clear mental picture of the relationship between the sounds of different languages，between the speech habits of English people and those，of your students．Unless the teacher has such a picture，any explanations he makes on his students'pronunciation are unlikely to be of much use，and lesson time spent on Pronunciation may well be wasted．

　　But it does not follow that you can teach pronunciation successfully as soon as you have read the necessary books．It depends，after that，what use you make of your knowledge；and this is a matter of technique．

　　Now the first and most important part of a language teacher's technique is his own performance，his ability to show off the spoken language，in every detail of sound as well as in fluent speaking，so that the student's ability for imitation is given the fullest space and encouragement．The teacher，then，should be as perfect a model in this field as he can make himself．And to make his own performance better，however satisfactory this may be，the modern teacher has in his hand recordings and a radio，to supply the real voices of native speakers，or，if the teacher happens to be a native speaker himself，or speaks just like one，then to change the method of presenting the language material．

　　However，the process of showing pronunciation，whether by personal ex-ample or with the help of machines，is only the beginning of teaching pronunciation．The technique of teaching each sound also needs to be considered．

1．How might the teacher find himself wasting lesson time？

[　　]

A．By spending lesson time on pronunciation．

B．Bu making ill-informed explanations upon pronunciation．

C．By not using books on phonetics in the classroom．

D．By not giving students a clear mental picture of the difference between

sounds．

2．Students have an ability for imitation which is________．

[　　]

A．plain and obvious

B．well developed

C．not yet developed

D．too weak to be useful

3．What is the main point the author makes about imitation of the teacher？

[　　]

A．It is a matter of secondary importance．

B．Students should be given every chance for it．

C．It depends on the student's ability．

D．Teachers are perfect models for students to imitate．

4．TO Someone teaching his own language to foreigners mechanical aids can________．

[　　]

A．improve his own performance

B．replace his own performance

C．provide examples of native speech

D．make his voice louder

5．Showing pronunciation is to be regarded as ________．

[　　]

A．a part of teaching pronunciation

B．an exercise of value in itself

C．an example of the use of mechanical aids

D．a technique for teaching separate sounds

A firm handshake is the key to interview success. As any serious job-hunter knows, it helps to dress smartly and smile at that all-important interview. But research has showed that a firm handshake is what really matters when it comes to impressing potential employers.
A US research looked at 98 undergraduates taking part in mock（模拟）interviews with businesses. As each undergraduate was graded on their general performance, five “handshake raters（评估人）” also marked them on their grasp, strength, duration, vigor and eye contact.
Professor Greg Stewart, from the University of Iowa, who led the study, said those who scored highly with the handshake raters were also considered to be the most hirable by the interviewers. Students with “wimpy” shakes were judged to be more timid（胆怯的）and less impressive.
The study also found women with a firm handshake were likely to be evaluated more favorably than their male counterparts.
Professor Stewart said: “We’ve always heard that interviewers make up their mind about a person in the first two or three minutes of an interview. But we found that the first impression begins with a handshake that sets the tone for the rest of the interview. We don’t consciously remember a person’s handshake but it is one of the first non-verbal（非语言的）clues we get about the person’s general personality, and that impression is what we remember.”
Women were less likely to have a highly rated handshake, partly because traditionally they shake hands less than men. But when women did possess a firm handshake, they were likely to be evaluated more favorably than their male counterparts.
Body language experts warn, however, that the firmness needs to be just right, —as an overenthusiastic “bone crusher” handshake can indicate self-importance, a controlling personality and a lack of reliability.
The handshake is thought to have originated in medieval Europe as a way for kings and knights to show that they did not intend to harm each other and possessed no hidden weapons.
【小题1】The passage is probably intended for_______.

A firm handshake is the key to interview success. As any serious job-hunter knows, it helps to dress smartly and smile at that all-important interview. But research has showed that a firm handshake is what really matters when it comes to impressing potential employers.

A US research looked at 98 undergraduates taking part in mock（模拟）interviews with businesses. As each undergraduate was graded on their general performance, five “handshake raters（评估人）” also marked them on their grasp, strength, duration, vigor and eye contact.

Professor Greg Stewart, from the University of Iowa, who led the study, said those who scored highly with the handshake raters were also considered to be the most hirable by the interviewers. Students with “wimpy” shakes were judged to be more timid（胆怯的）and less impressive.

The study also found women with a firm handshake were likely to be evaluated more favorably than their male counterparts.

Professor Stewart said: “We’ve always heard that interviewers make up their mind about a person in the first two or three minutes of an interview. But we found that the first impression begins with a handshake that sets the tone for the rest of the interview. We don’t consciously remember a person’s handshake but it is one of the first non-verbal（非语言的）clues we get about the person’s general personality, and that impression is what we remember.”

Women were less likely to have a highly rated handshake, partly because traditionally they shake hands less than men. But when women did possess a firm handshake, they were likely to be evaluated more favorably than their male counterparts.

Body language experts warn, however, that the firmness needs to be just right, —as an overenthusiastic “bone crusher” handshake can indicate self-importance, a controlling personality and a lack of reliability.

The handshake is thought to have originated in medieval Europe as a way for kings and knights to show that they did not intend to harm each other and possessed no hidden weapons.

1.The passage is probably intended for_______.

A．job-hunters        B．an undergraduate   C．employers         D．handshake raters

2.Which of the following statements is true according to the passage?

A．The firmer your handshake is the better impression you leave.

B．The undergraduates without a firm handshake are less competitive.

C．Generally speaking, women shake hands less with others.

D．The handshake dates back to medieval Europe.

3.What is the main idea of the passage?

A．The handshake determines a person’s personality.

B．A successful job interview starts with a firm handshake.

C．The first few minutes of the interview really counts.

D．Job interview success depends on a number of factors.