Better think twice before choosing a password for e-mail, online bank or shopping. Simple passwords are easy to be stolen.

A password is like a key to your home. If someone steals it, he'll get chances to steal something else. We use passwords everywhere in our life. We are so used to passwords that we don't pay any attention to them until we lose or forget one.
A study of 28,000 passwords recently stolen from a popular website showed that people often do the easy thing. It found that 16 percent took a first name as a password. Another 14 percent used the easiest keyboard combinations such as “12345678” or QWERTY. Five percent of the stolen passwords were names of television shows or stars popular with young people. Three percent of the passwords expressed feelings like “I don't care,” “Whatever,” “I love you,” or their opposite, “I hate you.”
Robert Graham, who did the study, advises people to choose a password that is longer than eight characters with one capital letter(大写字母) and one symbol.
Of course, safe passwords don't mean those hard to remember. Forgetting your password is sometimes a big headache for you. Maybe, the perfect password is easy for you and hard for others.

Americans love cars. They go everywhere in them. 85% of people in the US go to and form work by car. And most adults have driving licenses. Why does this car culture exist?

How it started

America's love of cars started after the war when soldiers returned home from World War Π to rebuild their lives. They borrowed money from the government to buy houses and cars which became the symbols of status（地位）. The more money they had, the bigger their cars were.

Making of roads

During the war, President Eisenhower noticed what good roads Germany had. He decided to build new four-lane（四车道）roads in America. He said is something happened suddenly, the two-lane roads wouldn't be able to carry all the cars that would suddenly leave the cities. Car and oil companies liked his idea and building started.

Car lovers

Not just teenagers are crazy about cars. Some Americans love their cars so much that they paint their cars beautifully. These are called Art Cars. Every April there is an activity in Houston, Texas, where they show their cars.

Pollution

Cars have polluted the environment. American President Bush refused a worldwide law that is against pollution. Many countries were angry about it. Bush said he had to think of the American economy（经济）and all the American people that make money from cars. Factories say they want to make cars that pollute less. But others say making cars that pollute less will never be as good as having fewer cars.

    Smog(雾霾) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with China Central Television, discussed the questions in her documentary Under the Dome.

    The 103 - minute film was published on major Chinese video - sharing websites on Feb 28. In the film, Chai visits polluted places and talks to officials and scientists. She comes to the conclusion that burning too much coal and oil are the main causes of PM2.5 and smog.

    To make things worse, according to Chai, the coal and oil we are burning is of poor quality and don't meet the standards for environmental protection. Therefore they have produced more harmful gas to pollute the air.

    To solve the problem, Chai suggests that we should clean our coal and oil or replace them with cleaner energy such as natural gas. In her film, Chai also pointed out that ordinary people can do something to help control smog too. For example, we live a greener life by using more public traffic. Or if we see things that could harm the environment, we can try to stop it. In one scene from the film, Chai sees a dirt mound in a building site exposed in the air, and asks the person in charge to cover it. When she sees a restaurant cooking without any suitable filter facilities, she calls the hotline 12369. The restaurant installed the filter a week later.

    Chen Jining, the new minister of environmental protection, praised Chai. "This film encourages ordinary people to care about the environment. This is what we need in the future. "

    As everyone knows, animals are our friends. Of all the animals, dogs are friendly to 1.

    Dogs are always staying 2 human beings. They are in different colours. There are many different 3 of dogs. Hunting dogs can 4people get more prey(猎物). The seeing-eye dogs can help 5people a lot. The police dogs can help the police.

    Today it is 6 to imagine the life without dogs. Maybe everyone is happy to see dog. Dogs are good at7 and smelling. Some dogs can find the people who are trapped(困) 8 the broken house. Some dogs can help take care of the houses. 9someone strange comes close to the house, they will bark to frighten him. Even some dogs can help look after kids when their 10 are not at home.

    In a word, dogs are our best friends among all animals.

    Is it a bird? Is it a plane? No, it's your online shopping! Imagine a world where your shopping was dropped off on your doorstep by a delivery (投递) drone (无人机). Well, many companies are working to make this idea a reality. Among them, Amazon and UPS are just some of the front runners in the race to have the first ever business drone delivery service.

Pros:

    ①Fast. Delivery drones can cut down the time of delivery to just 30 minutes.

    ②Environmentally friendly. Companies like UPS have started that the use of drones would cut down on waste gas (气体).

    ③Cheap. Though exact prices for drone delivery aren't known, companies such as Amazon suggest deliveries could be as cheap as $1.

    ④Emergencies. Drones can fly straight to areas they're needed without using any roads.

From Dispatch (分派) to Doorstep:

    Usually products available for drone delivery will be stored somewhere nearby. Customers will choose these products through shopping apps or websites. The suggested weight to be carried is no more than 2.3 kilograms. Once the products are put into the drone, it will take off from the dispatch center. It will fly below 120m and avoid any "No Fly Zones" like airports for safety reasons. Before landing, a pad will be placed in the customer's garden for the drone's landing. After the drone puts down its product, it will rise to return to the dispatch center. So a drone delivery could one day be just a touch of an app with your finger.

Cons:

    ①Weather like strong winds, lightning storms and heavy rainfall may influence deliveries.

    ②Dispatch centers will have to be built within certain distance.

    ③Drones might be unable to land safely in high-rise buildings.

    ④Something will have to be done to make sure about the safety of the products and of people walking below.

    The future of flying transportation

    Though the delivery drone service is alive with new technology, we are a long way from seeing them through the air. There are still many difficulties such as flight law making. It's said that by 2021 we might see the beginning of drone delivery systems in action.

    Hiccup is a young Viking. Toothless is a dragon and he can give off fire with his mouth. They go through many ups and downs together in the How to Train Your Dragon(《驯龙高手》) movie series. Now they are back with a new film!

    In the last movie, they had to protect their home. Humans and dragons lived together happily there. But now, there are too many dragons. A man tries to kill them. He burns down parts of their home. Hiccup and Toothless have to look for a new world for dragons to live in. Will they find it? Find out by watching How to Train Your Dragon: the Hidden World.

    Dragon acts

    The How to Train Your Dragon movies are from the book series of the same name British writer Cressida Cowell wrote the 12—book series. They came out from 2003 to 2015.

    How to Train Your Dragon the Hidden World is the last movie in the series. It opened in Chinese mainland theaters on March 1. Toothless get his name because he has retractable(伸缩自如的)teeth.