The Garbage (垃圾) Project started at the University of Arizona in 1973. Since then, the students and teachers in it have studied the modern garbage in different cities.

To study the garbage, the students had to travel to landfills, the places where cities bury (填埋) their garbage. While the students were studying the garbage, they wore special clothes. Students were very careful when they opened bags of garbage.

One important thing the students have learned from studying the garbage is that the garbage in landfills disappears very slowly. That was surprising to both the students and many scientists who had thought that about 70% of the garbage in landfills would disappear quickly. Even in cities where it rains a lot, the students found newspapers from 1948, 40-year-old hot dogs, and vegetables from 1970. And the students also found many more empty bottles of cola than they expected.

As society develops, there is more and more waste produced in our daily life. How to dispose of our garbage well depends on what kind of garbage it is: regular (普通的) garbage, dangerous materials, or recyclable materials, such as newspapers and glass bottles. Regular garbage goes to regular landfills. Dangerous materials are harmful to people’s health and the environment. They shouldn’t go into regular landfills. And people should try their best to reuse the resource and reduce the amount of using them. It is high time that people need to divide different kinds of waste and put them into different dustbins, which will be a great help to cleaning workers as well as the whole society.

Homes are full of dangerous waste. One kind of the dangerous waste in homes is batteries (电池). When batteries are buried directly in a landfill, they often break open. The poison inside them moves through rain water to the bottom of the landfill. Then it can pollute the natural water in the ground.

Another dangerous waste from homes is motor oil. When people pour old motor oil on the ground or throw it in the garbage, it pollutes the environment.

Our garbage problem is not new, but as the world’s population continues to grow, it will become a bigger and bigger problem.

1.To study the modern garbage, the students had to do many things except _________.

A.wearing special clothes B.traveling to landfills

C.burying the garbage themselves D.opening bags of garbage

2.The words “dispose of” in Paragraph 4 probably mean “_________”.

A.put away B.deal with C.worry about D.make up

3.What can we learn from the passage?

A.Old motor oil should go to regular landfills.

B.There are only two kinds of dangerous waste in homes.

C.Batteries are often broken when they are buried directly in a landfill.

D.The students found empty bottles of cola were not as many as they expected.

When you’re not at home, many worries may start to crowd your mind. Did I turn the coffee maker off? Did I lock the door? Are the kids doing their homework or watching TV? With a smart home, you can forget all of these worries.

A smart home is a home with a communication network. This network connects(连接) devices (装置), such as lights and TV sets, and makes them to be controlled( 控制) from far away through electrical wiring( 电线), mobile phone communication or WiFi over the Internet.

More and more people may start to think about owning a smart home, because it makes life much easier. It can help keep your room at a certain temperature. It can record (录制) what happens inside the home and send the video to your phone. When you are on holiday abroad, you can use a smart home controller to switch on or off the electricity when necessary. Some smart homes can receive a visitor, allowing him to come in and offering him a drink. They can even feed the cat and water the plants.

Besides, smart homes are easy to fix. Most smart home technology and devices are wireless and can be set up with a minimum ( 最 少 量 ) of tools, using only the guiding information. When there is a problem, you can deal with it yourself without paying a professional (专业人士).

However, for home-users, the smart home technology is far from perfect. It can be rather expensive to own the technology and the devices. Also, because the smart home system ( 系 统 ) allows its owner to get home information from anywhere, it leaves the home easy to be attacked by hackers ( 黑 客 ), who may secretly use or change the information in the system.

Now, many scientists are excited about the future of smart home technology. Imagine being able to get fashion advice from your mirror, or receive food shopping suggestions from your fridge. While there are others who worry that those smart devices will make people lazier and lonelier. Whatever it is, one thing is for sure — smart home technology will change the way we live and work.

1.According to the passage, nowadays a smart home can lock the door through .

A.electric lights B.mirror technologies

C.mobile phones D.shopping programs

2.The third paragraph of the passage is mainly about .

A.the steps to use smart systems B.the prices of smart programs

C.the good points of a smart home D.the tools for setting up smart devices

3.Which of the following is TRUE about a smart home according to the passage?

A.Smart homes can’t help feed pets nowadays.

B.Smart homes cost a lot of money at present.

C.You can’t control your smart home in other countries.

D.It’s hard for hackers to get information from smart homes.

4.What’s the writer’s opinion(观点) according to the passage?

A.People will become less happy in the future.

B.People’s life style will be different in the future.

C.Mobile phones are the most important in smart homes.

D.Smart homes are much better than other smart systems.

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