根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

   As we get older, most of us worry about grey hair, wrinkles and maintaining a youthful body.   1.    Here, Mr. Rubin, a voice expert, reveals how to keep your voice youthful.

Drink more fluid and avoid spicy food

    You need water for the vocal cords(声带) to vibrate well. The body must keep absorbing enough water to make the vocal cords operate well. Drinking 1.5 liters of water a day at intervals of 15 minutes is very important.    2.   

    Rest the throat and talk regularly

    The vocal cords can be scarred if you use your voice during a bad cough. If you have a case of laryngitis(喉炎) with a cold, you should rest your voice for a day or two, and seek medical advice.

    Simply staying sociable and using your voice is very important. “As older people have less mobile, they can become socially isolated and speak less,” says Mr. Rubin. “The elderly need to communicate with people more.    3.  ”

       4. 

    Good posture is essential to keeping the voice young, so we’d better stand properly. Exercise helps you take deeper breaths as it means there is better airflow through the voice box, producing a stronger tone.

    Sing in the shower

    This is one of the best ways to preserve your voice, as it keeps the larynx muscles strong while the steam lubricates the voice box. “   5.  ” says Mr. Rubin. Joining a choir is one of the best ways to preserve a youthful tone.

A. Improve your posture

B. By using the vocal cords, they enable the ageing process to slow down.

C. But people often don’t realize the voice needs looking after.

D. The Voice of Young Science programme encourages early career researchers to play an active role in public debates about science.

E. Singing is to the voice what gymnastics are to human beings.

F. Using the vocal cords regularly will definitely age our voice more quickly.

G. Mr. Rubin advises avoiding foods with an annoying effect on the stomach, such as onions, chili, fizzy drinks and chocolate.

请从以下选项（A、B、C、D和E）中选出符合各段意思的小标题, 选项中有一项是多余选项。
A. Early to Bed, Early to Rise
B. Read Challenging Books
C. Relax yourself
D. Minimize Television Watching
E. Take Time to Reflect
Five Simple Ways to Increase Your Intelligence
Your brain needs exercise just like a muscle. If you use it often and in the right ways, you will become a more skilled thinker and increase your ability to focus.  
Here are 5 simple ways anyone can squeeze a bit more productivity out of the old gray matter.
【小题1】_________-This is a hard sell. People love vegetating in front of the television, myself included more often than I’d like. The problem is watching television doesn’t use your mental capacity OR allow it to recharge. It’s like having the energy sapped out of a muscle without the health benefits of exercise.
When you feel like relaxing, try reading a book instead. If you’re too tired, listen to some music. When you’re with your friends or family, leave the tube off and have a conversation. All of these things use your mind more than television and allow you to relax.
Exercise- I used to think that I'd learn more by not exercising and using the time to read a book instead. But I realized that time spent exercising always leads to greater learning because it improves productivity during the time afterwards. Using your body clears your head and creates a wave of energy. Afterwards, you feel invigorated（精力充沛）and can concentrate more easily.
【小题2】_________-Many people like to read popular suspense fiction, but generally these books aren't mentally stimulating. If you want to improve your thinking and writing ability you should read books that make you focus. Reading a classic novel can change your view of the world and will make you think in more precise, elegant English. Don’t be afraid to look up a word if you don’t know it, and don’t be afraid of dense passages. Take your time, re-read when necessary, and you’ll soon grow accustomed to the author’s style.
【小题3】_________-Nothing makes it harder to concentrate than sleep deprivation. You'll be most rejuvenated if you go to bed early and don’t sleep more than 8 hours. If you stay up late and compensate by sleeping late, you’ll wake up lethargic（无精打采）and have trouble focusing. In my experience the early morning hours are the most tranquil and productive. Waking up early gives you more productive hours and maximizes your mental acuity（敏锐）all day.
If you have the opportunity, take 10-20 minute naps when you are hit with a wave of drowsiness. Anything longer will make you lethargic, but a short nap will refresh you.
【小题4】_________-Often our lives get so hectic that we become overwhelmed without even realizing it. It becomes difficult to concentrate because nagging thoughts keep interrupting. Spending some time alone in reflection gives you a chance to organize your thoughts and prioritize your responsibilities. Afterwards, you’ll have a better understanding of what's important and what isn’t. The unimportant stuff won’t bother you anymore and your mind will feel less encumbered.
Conclusion-I hope you aren’t disappointed that none of the techniques I've proposed are revolutionary. But simple, unexciting answers are often the most valid. The challenge is having the will to adhere to them. If you succeed in following these 5 tips, you’ll be rewarded with increased mental acuity and retention of knowledge.

Which animal has the fastest snapping jaw (颚)? If you're guessing a shark or perhaps a larger animal, you'll have to think smaller. The trap­jaw ant, which lives in Central and South America, moves its mouth parts at 35 to 63 meters per second. Another way to think about this is that the ant's jaws close at 125 to 233 kilometers per hour. That's 2, 300 times faster than the blink of an eye.

Scientists were able to measure the amazing jaw speed using high­speed video techniques. Sheila Patek, a biologist, says the key is that the jaws have a springy (有弹性的) system, which is critical in getting explosive (爆发性的) speeds.

Consider a bow and arrow. If you try to throw an arrow with your arm, it won't go very far. If you use a bow, elastic energy stored in the bow is released almost instantly when you release the arrow with your finger or a latch. The combination of the springy bow and latch mechanism is what makes the arrow zoom through the air.

Maybe even more amazing than how fast these ants grab food or even enemies is how they use this same energy to move. As the ant closes its jaws, it uses them to push off the ground—all faster than the eye can see without slow motion video. A snap of the jaw can send an ant up to 8.3 centimeters into the air. That's like someone who is 1.7 meters jumping 13 meters high! Not only can they quickly escape from enemies, but often a group of ants will start jumping all at once. It would be hard for their enemies to grab just one.

People have suspected the ants used their jaws to jump for over a century, but could only prove it with today's modern video equipment.

1.The fast speed of the trap­jaw ant's jaw lies in ________.

2.The passage uses “a bow and arrow” as an example to show ________.

3.Which of the following may amaze the scientists most?

4.According to the passage, the trap­jaw ants' jaws keep them safe because ________.

Some places in the world have strange laws. It’s important for you to know about them before going there.

   Whoever likes to chew gum(口香糖) may have to leave Singapore. The government really wants to keep the city clean and will fine you for chewing gum.

   Before you leave for the United Arab Emirates you’d better make sure you aren’t visiting during Ramadan(斋月). During that time you aren’t allowed to eat or drink in public. Tourists have been fined up to $275 for drinking in public.

   Lovers spend so much time kissing each other goodbye at train stations that trains often start late. This law — no kissing your lover goodbye at train stations – is rather old, and isn’t in use today in France.

   In Thailand it’s against the law to drive a car or motorcycle without a shirt on, no matter how hot it is. Punishments are different in different areas and can include warnings and tickets costing about $10. No joke -- the local police will stop you.

  Studies in Denmark have shown that cars with their headlights on are more noticeable by other drivers than those with their headlights off. Drivers there are required to leave their headlights on even during the day, or they may face a fine up to $100.

   Do you often buy things using coins? Don’t do it in Canada. The Currency Law of 1985 doesn’t allow using only coins to buy things. Even the use of the dollar-coin is limited (受限制的). The shop owner has the right to choose whether to take your coins or not.

   Make sure you know about these laws before your next trip. Better safe than sorry.

What is mainly talked about in the text?

A. How to make your trip around the world safe.

B. Why there are strange laws in the world.

C. Interesting places you can go to around the world.

D. Some strange laws you should know about for your trip.

If you are driving a car in Thailand, _____.

A. the police will play a joke on you

B. you should wear your shirt even though it’s hot

C. the police will give you tickets costing about $10

D. you should always keep your headlights on

What can we learn from the text?

A. Kissing goodbye at train stations isn’t allowed in France today.

B. The Singaporean government cares a lot about its environment.

C. Tourists in the United Arab Emirates shouldn’t eat in public.

D. You can turn your headlights off in daytime in Denmark.

What do we know about the strange law in Canada?

A. It is a newly invented law.           B. You aren’t allowed to use dollar-coins.

C. You will be fined if you use coins.     D. Shop owners can decide if you can use coins.

Are you nervous about climbing because you think it's too dangerous? Do you feel you're not fit enough to climb? Do you know how to start climbing?

Let's consider the idea that climbing is dangerous．Being afraid is natural, but if you use suitable ropes and other climbing equipments you will feel completely safe．Climbers are usually very careful because they know what they are doing is dangerous．Accidents happen, but when they do, they tend to attract a lot of publicity．As a result, people think there are many more accidents than there are in reality．

You cannot expect to start climbing straight away．Climbing is a challenge and challenges take time．It is necessary first of all that you achieve a good level of fitness．Begin as soon as you become interested in climbing? go to the gym, go swimming, take up jogging and continue to do so throughout your training period．

Discover as much as you can about climbing．Visit the library and find book, especially for beginners or buy climbing magazines and look for articles which describe your situation．Look up information on the Internet．Find out about equipment, methods and places to go．

Next, take a course on a climbing wall．There are plenty of climbing walls all over the country which have trained and qualified people as instructors．Call your local leisure centre to find out if there is one in your area. These training sessions are a quick way to get experience and you are likely to meet other beginners. After this, you can do an outside course of join a club where you can meet climbers of all abilities and eventually join in group-climbing events.

At first you may not understand the importance of a good training period, but after you have completed your first climb and you are standing safely at the top of a rock feeling thrilled, then you will know it was the right thing to do.

1.The article is written by            .

A．a doctor                                                                      B．an experienced climber

C．a beginner                                                                  D．a fitness instructor

2.The writer thinks a new climber should           .

A．begin by becoming fit

B．have the courage to meet the challenges

C．be aware of the causes of the accidents

D．do enough sports to get interested in climbing

3.By climbing walls you can         .

A．join a club you like

B．gain controlled experience

C．become qualified instructors

D．take part in group-climbing events

4.The underlined word “it” in the last paragraph probably means      .

A．the climb                           B．the training             C．the equipment       D．the achievement