Memory, they say, is a matter of practice and exercise. If you have the wish and really made a conscious（自觉的）effort, then you can quite easily improve your ability to remember things. But even if you are successful, there are times when your memory seems to play tricks on you.

    Sometimes you remember things that really did not happen. One morning last week, for example, I got up and found that I had left the front door unlocked all night, yet I clearly remember locking it carefully the night before.

    Memory “trick” work the other way as well. Once in a while you remember not doing something, and then find out that you did. One day last month, for example, I was sitting in a barber（理发师）shop waiting for my turn to get a haircut, and suddenly I realized that I had got a haircut two days before at the barber shop across the street from my office.

    We always seem to find something funny and amusing（有趣的）in incidents caused by people's forgetfulness or absent-mindedness. Stories about absent-minded professors have been told for years, and we never got tired of hearing new ones. Unfortunately, however, absent-mindedness is not always funny. There are times when “trick” of our memory can cause us great trouble.

    Chinese scientists recently have produced two monkeys with the same gene, Zhong Zhong and Hua Hua, using the same technique that gave us Dolly the sheep. These monkeys are not actually the first primates（灵长类）to be cloned. Another one named Tetra was produced in the late 1990s by embryo（胚胎）splitting, the division of an early-stage embryo into two or four separate cells to make clones. By contrast, they were each made by replacing an egg cell nucleus（原子核）with DNA from a differentiated body cell. This Dolly method, known as somatic cell nuclear transfer（SCNT）, can create more clones and allows researchers greater control over the edits they make to the DNA.

    Success came from adopting several new techniques. These included a new type of microscopy to better view the cells during handling or using several materials that encourage cell reprogramming, which hadn't been tried before on primates. Still, the research process proved difficult, and many attempts by the team failed. Just two healthy baby monkeys born from more than 60 tested mothers. This leads to many researchers' pouring water on the idea that the team's results bring scientists closer to cloning humans. They thought this work is not a stepping stone to establishing methods for obtaining live born human clones. Instead, this clearly remains a very foolish thing to attempt, it would be far too inefficient, far too unsafe, and it is also pointless.

    But the scientists involved emphasize that this is not their goal. There is now no barrier for cloning primate species, thus cloning humans is closer to reality. However, their research purpose is entirely for producing non-human primate models for human diseases; they absolutely have no intention, and society will not permit this work to be extended to humans. Despite limitations, they treat this breakthrough a novel model system for scientists studying human biology and disease.

    Hollywood movies are regularly filled with sex and violence. They can be exciting films but sometimes all you want is a little light-hearted entertainment.

    Have you heard of Bollywood? All singing, all dancing and unrealistic, it is the perfect alternative to normal Hollywood movies. Bollywood is the Indian film industry, based in Mumbai, formerly known Bombay. {#blank#}1{#/blank#} Yet Bollywood is the largest producer of films in the world. This year the Indian Filmgare Awards, Bollywood's Oscars, turn 50 years old.

    The typical Bollywood movie usually has the following ingredients: a cup of romance, a tea-spoon of comedy, a dash of international sight-seeing, served with a huge slice of singing and dancing. There will also be one brave hero, one beautiful heroine and one baddie. {#blank#}2{#/blank#}

    Bollywood films are full of ideal things and free of daily worries. {#blank#}3{#/blank#} The actors change clothes and locations within a single song. But the audience don't mind. To Indian movie lovers, especially the poor, such films are a gateway to heaven and the stars are their gods. The films take them to a magical world away from their everyday troubles. The films tell them the impossible is possible and that true love conquers all.

    {#blank#}4{#/blank#} Behind the beautiful scenes, Bollywood still emphasizes traditional family values. In most films, if two lovers want to break an arranged marriage, they can't just run away. They must win over their parents.

    Bollywood is a decent refreshing replacement for those over-stimulating Hollywood films. {#blank#}5{#/blank#} They will take you to a brighter, cheerier and more colorful world, where it's still cool to dance around a tree and sing a love song.

A．Bollywood has gradually won its reputation on the world stage.

B．There is never any mention of politics, poverty or war.

C．Most Chinese school kids have probably never seen an Indian film.

D．Bollywood films are mostly comic romances with light-hearted incidental music.

E.  Bollywood pays great attention to traditional values.

F．The result is a fun-filled musical.

G．So if you're tired of all that Hollywood actions, check out the following Bollywood films.

    Mandara seemed to know something big was about to happen. So she let out a yell, caught hold of her 2-year-old daughter Kibibi and climbed up into a tree. She lives at the National Zoo in Washington D. C.

    And on Tuesday, August 23rd, witnesses said she seemed to sense the big earthquake that shook much of the East Coast before any humans knew what was going on. And she's not the only one. In the moments before the quake, an orangutan（猩猩）let out a loud call and then climbed to the top of her shelter.

    “It's very different from their normal call,” said Brandie Smith, the zookeeper. “The lemurs（monkeylike animals of Madagascar）will sound an alarm if they see or hear something highly unusual.”

    But you can't see or hear an earthquake 15 minutes before it happens, can you? Maybe you can—if you're an animal. “Animals can hear above and below our range of hearing,” said Brandie Smith. “That's part of their special abilities. They're more sensitive to the environment, which is how they survive.”

    Primates weren't the only animals that seemed to sense the quake before it happened. One of the elephants made a warning sound. And a huge lizard（蜥蜴）ran quickly for cover. The flamingoes（a kind of birds）gathered before the quake and stayed together until the shaking stopped.

    So what kind of vibrations（震动）were the animals picking up in the moments before the quake? Scientist Susan Hough said earthquakes produce two types of waves—a weak “P” wave and then a much stronger “S” wave. The “P” stands for “primary”. And the “S” stands for “secondary”. She thinks the “P” wave might be what sets the animals off.

    Not all the animals behaved unusually before the quake. For example, Smith said the zoo's giant pandas didn't jump up until the shaking actually began. But many of the other animals seemed to know something was coming before it happened. “I'm not surprised at all,” Smith said.

    The Center for Humane Technology is made up of people who created many popular apps(软件)for big tech companies like Google, Facebook and Twitter. {#blank#}1{#/blank#}

    The center has started a movement called the Truth About Tech. Its purpose is to teach students, parents and teachers about the dangers of spending too much time on smart phones and computers.

    According to studies on kids and technology, more than 95 per cent of primary school children spend time every day using a computer, or smart phone. About 78 per cent of teenagers check their phones every hour. {#blank#}2{#/blank#} They are afraid that they may miss an important call or message during night.

    {#blank#}3{#/blank#} For example, spending too much time online can cause people to put on weight and also influence how they feel. Many people become worried or nervous because they feel they aren't having as much fun as their friends are. {#blank#}4{#/blank#} They may also find it harder to make friends in real life.

    {#blank#}5{#/blank#} They say that when big tech companies are designing tech tools for kids, they should think about what they would want for their own children.

A. These people are worth our respect.

B. Now they are telling kids to put their phones away.

C. Most students are forbidden to use a phone in class.

D. And more than half of them sleep with their phones.

E. Students may have a harder time paying attention in school.

F. Using phones or computers too much can cause some health problems.

G. The center also wants governments and tech companies to take steps to protect children.