Our life has become easier and more colorful because of mobile phones and the Internet. However, a number of worrying problems have come along with them.

Many car accidents are caused by mobile phones. Some drivers use mobile phones to get on the Internet while driving. Looking at their mobile phones and not at the road, these drivers have become a danger to us all.

Many of the dangers of the Internet are well known. Children who visit websites without their parents‘' permission sometimes talk to elder people they don't know and put themselves in great danger. People with blogs sometimes post information of people they don't know on their websites without permission. Some people even use the Internet to get personal information that we do not want them to have.

    Mobile phone and the Internet safety tips：

Use a ‘hands-free' phone if you need to use a mobile phone when you drive.

     In difficult driving situations such as in rain or snow, do not use your phone at all.

     Do not make very important phone calls while driving. They take your attention (注意力) off the road.

     Tell your children not to talk with anyone they do not know on the Internet.

     In an embarrassing situation (尴尬场合), be careful with people around you.

Don't give out any personal information on the Internet.

    Butterflies are common all over the world，but butterflies in hotter countries are usually bigger and more brightly colored than those in cooler countries，and there are more different kinds．

   Usually the male butterflies are more brightly colored than the females．The females have bigger and heavier bodies since they carry the eggs．The bright colors of the males help to attract the females，and the duller colors of the females make them less likely to be caught by enemies before they have laid their eggs．

   Some butterflies have bright pattern colors on the upper surface of their wings that show when flying ,but when they rest on a tree or leaves , they close their wings．On the undersides of their wings there are green and brown marks which look like the tree or leaves．They are then difficult to be seen．The best example of this is the Dead Leaf Butterfly．When its wings are c1osed，it looks exactly like a dead leaf．There are even marks that look like the holes in a dead leaf．When the butterfly is run after by a bird，it closes its wings and seems to have disappeared completely．

Under the beauty of their colorful covers, the butterflies have their own way to avoid being killed by their enemies. So do the other animals. That's the rules of the nature and also the gifts that were born with.Many butterflies have round marks on their wings that look like eyes.The round marks have a useful function(功能)．When the butterflies are resting，their wings are closed，and these marks can't be seen. When a bird sees one，and begins to attack it，the butterfly will open its Wings. The bird thinks that it sees two eyes staring at it，frightened，and flies away.

We rely on our memory for sharing stories with friends or learning from our past experiences. Yet evidence shows that our memory isn't as consistent as we'd like to believe.

There are countless reasons why tiny mistakes might happen each time we recall past events. And whenever these mistakes happen, they can have long-term effects on how we'll recall that memory in the future.

Take storytelling for example. When we describe our memories to other people, we might ask ourselves whether it's important to get the facts straight, or whether we only want to make the listener laugh. And we might change the story's details depending on the listener's attitudes. It isn't only the message that changes, but sometimes it's also the memory itself. This is known as the "audience-tuning effect", showing us how our memories can change automatically over time, as a product of how, when, and why we access them.

In fact, sometimes simply the act of repeating a memory can be exactly what makes it easy to change. This is known as "retrieval-enhanced suggestibility". In a typical study of this effect, participants watched a short film, then took a memory test a few days later. But during the days between watching the film and taking the final test, two other things happened. First, half of the participants took a practice memory test. Second, all of the participants were given a description of the film to read, which contained some false details. Participants who took a practice memory test shortly before reading the false information were more likely to reproduce this false information in the final memory test.

Why might this be? One theory is that repeating our memories of past events can temporarily make those memories malleable. In other words, retrieving（找回）a memory might be a bit like taking ice-cream out of the freezer and leaving it in direct sunlight for a while. By the time our memory goes back into the freezer, it might have naturally become a little misshapen, especially if someone has influenced it purposely in the meantime.

These findings lead us to wonder how much our most treasured memories have changed since the very first time we remembered them. Remembering is an act of storytelling, after all. And our memories are only ever as reliable as the most recent story we told ourselves.

Anna and her friends want to buy some things. Here is their shopping list(购物清单).

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