How do you feel after you've stayed up late to finish schoolwork? Or the day after a slumber party? Scientists now say that your answers to these questions may depend on your genes.

Genes are stretches of DNA that work like an instruction manual for our cells. Genes tell our bodies and brains what to do. People have about 40,000 genes, and each gene can have different forms. So, for example, certain forms of some genes make your eyes blue. Other versions of those genes make your eyes brown.

In a similar way, new research suggests that a gene called period3 affects how well you function without sleep. The discovery adds to older evidence that period3 helps determine whether you like to stay up late or get up early.

The period3 gene comes in two forms: short and long. Everyone has two copies of the gene. So, you may have two longs, two shorts, or one of each. Your particular combination depends on what your parents passed on to you.

Scientists from the University of Surrey in England studied 24 people who had either two short or two long copies of period3. Study participants had to stay awake for 40 hours straight. Then, they took tests that measured how quickly they pushed a button when numbers flashed on a screen and how well they could remember lists of numbers.

Results showed that the people with the short form of period3 performed much better on these tests than the people with the long form did. In both groups, people performed worst in the early morning. That's the time when truck drivers and other night-shift workers say they have the most trouble concentrating.

After the first round of experiments, participants were finally allowed to sleep. People in the group that performed well on the tests took about 18 minutes to nod off.

People with the long period3 gene, by contrast, fell asleep in just 8 minutes. They also spent more time in deep sleep. That suggests that people with the long form of the gene need more and deeper sleep to keep their brains working at top form.

1.We can know from the passage that genes can not ________.

2.Which of the following statements about the period3 is wrong?

3. People with the short form of period3__________.

4.What’s the best title of the passage?

下面文章中有5个段落需要添加首句。请从以下选项（A、B、C、D、E和F）中选出适合各段落的小标题。选项中有一项是多余选项。

A. How inner beliefs can help

B. How to develop positive habits

C. Improve your life

D. You can do it

E. Action plan

F. Why are habits so important

The single most important factor that contributes to success is what you do every single day. It is as simple as that. Your habits will determine whether you are successful or not. If you have strong and healthy positive habits, it does not mater whether or not you fail today because you are guaranteed to succeed in the long run.

1._________________________________

Because you repeat the same actions and the same behaviors every single day, a single positive action will not change your life, but the same action repeated 1,000 times will have a significant impact on your life. For example, if you go to the gym one time, you won’t see a big difference in your life. However, if you go to the gym 1,000 times over a five year period, you will see a big difference in your body. The same principle applies to finance, health, relationships, work, career, and school. Simple positive actions repeated every single day will have a great impact on your life in the long run.

2._________________________________

There’s nothing easier than developing positive habits. You simply have to do every single day the action you want to make a habit. If you want to develop the habit of running, run almost every day. If you want to develop the habit of eating healthy, eat healthy every day. If you want to develop the habit of reading, read every day. Habits are created by repetition. The more you do an action, the easier it becomes in the long run.

3._________________________________             

If you want to be successful in changing your habits, you should think about changing your inner beliefs about your habits. For example, your old belief was: “I love cigarette because it makes me feel good and relaxed. I need cigarette to be happy and relaxed.” If you keep this belief, you won’t be able to keep your resolution to stop smoking for very long. Instead, you should adopt this new belief: “I love yoga because it makes me feel good and relaxed. Cigarette is poisonous and destroys my body. Yoga makes me happy.” You should analyze your beliefs and make sure they won’t stop you from changing your habits. The same is true when you try to form positive habits. If you want to start eating healthy food, here are some positive beliefs you should start thinking about: “Healthy food is very good for my health. It gives me a lot of energy and I feel very good.”

4.____________________________________          

It’s now time for you to develop positive habits in your life and avoid your negative habits. Write down 3 positive habits that you would like to develop and 3 negative habits that you would like to get rid of. For each positive habit, write down exactly what actions you’re going to take every single day in order to develop the new habit. For each negative habit, write down exactly what actions you’re not going to take in the next weeks. Here are some positive habits that will lead to success: exercise, healthy food, reading, saving, studying, healthy relationships, hard work, etc.. Here are some negative habits to get rid of: gambling, drug and alcohol abuse, overeating, shyness, etc..

5._____________________________________             

Everybody can change. All it takes is courage and commitment. Decide right now to improve your life by changing your habits. Take action right now! Don’t be afraid. Yes, you will probably make mistakes along the way. But never forget that success is guaranteed for you if you have positive habits in your life. If you refuse to quit, success will be yours.

认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

注意：每个空格只填1个单词。请将答案写在答题纸相应题号的横线上。

Mirriam Websters online dictionary defines happy as: enjoying good health and satisfaction. Sounds nice, doesn’t it? I know a secret that can lead to happiness. Now you may ask, what secret is that? It’s a well-known secret, in fact. Perform a random(随意的) act of kindness per day.

Positive psychology is the scientific study of the strengths and virtues that enable individuals and communities to grow. According to University of Pennsylvania’s website, positive psychology has three central concerns: positive emotions, positive individual character, and positive systems. Understanding positive emotion includes the study of satisfaction with the past, happiness at present, and hope for the future. Understanding positive individual character consists of the study of the strengths and virtues, such as love, courage, creativity, curiosity, self-knowledge, self-control, and wisdom. Understanding positive systems needs the study of meaning and purpose as well as the strengths that help the growth of better communities, such as responsibility, leadership, teamwork, purpose, and tolerance(忍耐力).

Positive psychology focuses on strengths as well as weaknesses, on building the best things in life as well as repairing the worst. It asserts(断言) that human goodness and excellence is just as real as sadness and illness, and that life consists more than seeking the answers to problems. All these things can be summed up in one concept: giving can equal a meaningful life, i.e. happiness.

But you are probably wondering how. Well, let’s examine the research, shall we? A 1996 study showed that wealth is only weakly related to happiness both within and across nations, particularly when income is above the poverty level. So money does not mean happiness. In 2000, a different study showed that activities that make people happy in some way—such as shopping, good food and making money—do not lead to satisfaction in the long term, indicating that these have quick diminishing returns(收益递减).

However, on the other hand, we also know that people who witness others perform good deeds experience an emotion which drives them to perform their own good deeds. Making a contribution to the lives of other people may help to extend our own lives.

This is why I make a point of trying to do something nice every day. Sometimes I tip much larger than I need to. Sometimes I just smile at someone who looks like they really need it. A random act of kindness is an act that receives just as much as it gives. You’ll be happier. They’ll be happier. And you’ll live longer. So, please, perform a random act of kindness each day.

With only about 1,000 pandas left in the world, China is desperately trying to clone the animal and save these in a dangerous situation. That's a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called "Noah's Ark".

Noah's Ark is aimed at collecting eggs, embryos(???), semen and DNA of these animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M's College of Veterinary, Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.

It is estimated that as many as 2, 000 species of mammals, birds and reptiles will probably become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.

This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.

The entire procedure could take from three to five years to complete.

"The nuclear transfer of one species to another is not easy, but the lack of available panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it's difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort," adds Kraemer, who is one of the leaders of the Project at Texas A&M, the first-ever attempt at cloning a dog.

"They are trying to do something that's never been done, and this is very similar to our work in Noah's Ark. We're both trying to save animals that face extinction. I certainly appreciate their effort and there's a lot we can learn from what they are attempting to do. The cooperation between us is very much needed."

67. The final aim of "Noah's Ark" project is to___________.       .

A. make efforts to clone the endangered pandas 

B. save endangered animals from dying out

C. collect DNA of endangered animals to study 

D. transfer the nuclear of one animal to another

68. According to Professor Kraemer, ___________.

A. the long time lasting cloning research could be successful.

B. the eggs transfers immediately result in having a baby.

C. the lack of nuclear transfer could be a major problem to have new pandas.

D. if species should die out, basic building blocks would heal them.

69. The best title for the passage may be______________.

A. China's Success in Pandas Cloning

B. Helping Ways to Avoid Extinction

C. Exploring the Possibility to Clone Pandas

D. The Practice in Noah's Ark

70. From the passage we know that______________.

A. Kraemer and his team have succeeded in cloning a panda

B. scientists try to implant a panda's egg into a rabbit

C. Kraemer will work with Chinese scientists in clone researches

D. about two thousand species are to die out in a century