If you have a bottle of water recycled(再利用) from urine(尿), would you drink it? Astronauts at the ISS may soon do so.
NASA(美国航空航天局) said it would use a high-tech machine to recycle wastewater at the ISS. The machine will recycle water for washing hands, shower water, water for brushing teeth and even urine to make drinking water. It will save millions of dollars each year.
At present, each ISS astronaut uses about 4.4 liters(升) of water every day. It costs about 24 million dollars a year to send water up to the ISS. A liter of water costs about $ 11,000.
The machine will be sent to the ISS later. NASA hopes it will recycle about 93% of all the water used on the station.
Will the water be clean? Different chemicals will be put in the wastewater. The water will be heated to 130℃ to kill bacteria(细菌). Scientists say that the recycled water is thousands of times better than the water from a city tap.
1.NASA will use a high-tech machine to recycle wastewater at the ISS to ______.
A．protect the ISS
B．make the astronauts work harder
C．provide better water and food for the astronauts
D．save the cost of sending water up to the ISS
2.At present it costs NASA about ______ dollars to transport water up to an astronaut at the ISS a day.
A．4.4 thousand B．11 thousand
C．48.4 thousand D．24 million
3.Scientists plan to get rid of bacteria in the wastewater by ______.
A．freezing B．heating
C．shaking D．precipitating(沉淀)
4.The passage mainly tells us something about ______.
A．water recycling at the ISS
B．the International Space Station
C．a high-tech machine
D．the cost of NASA
5.Which of the following sentences is TURE?
A．The recycled water is much better than that from a city tap.
B．The high-tech machine will recycle all the water used on the station.
C．The ISS astronauts use more water than us.
D．The high-tech machine can only recycle urine to make water.
Many people hurt their backs when they try to lift heavy things from the floor. It is easy to hurt your back muscle(肌肉) when you try to pick up a heavy thing. However, there is a correct way to lift things from the floor. If you pick up heavy things correctly, you probably will not hurt your back.
To lift something from the floor correctly, first bend (弯曲) your knees and lower yourself. Keep your back straight. Do not bent over, from your waist (腰) keep your back and hips (臀部) and waist in a line. If you bent over, the muscles in your lower back can became hurt very easily. If you keep your back and hips straight, the muscles are stronger, because they hold up together. The other muscles can then help the lower back muscles.
As you lower yourself, try to get as close to thing as you can, put one knee on each side of the thing. Remember at all times to keep your back straight. Put your hand under the thing that is in front of you, between y our knees.
To lift the thing, you should stand up slowly. Use your leg muscles in order to stand up. In other words, lift with your legs, not with your back.
1.Which part of your body is more easily to be hurt when you lift heavy things?
A．The leg muscles. B．The back muscles
C．The hips D．The knees
2.Many people hurt their backs when they lift something because _______.
A．they are not strong
B．the things are very heavy
C．the way to lift the things is not correct
D．they are very heavy
3.The muscles are stronger if you _______.
A．keep your back, hips and waist in a line
B．bend over from your waist
C．lower yourself
D．get down on your knees
4.To lift heavy things, the most important of all is to _________.
A．stand up slowly
B．keep your back straight
C．bend your knees
D．put one knee on each side
5.What does “In other words” mean? ________
A．总而言之 B．换句话说 C．在其它话中 D．在其它单词中
At the shopping mall, you probably think about spending, not saving. Think about all the lights that keep the mall bright. Think about all the water faucets in the toilet. Think about all the air conditioning in summer. Saving energy is a hot topic for such a big place!
Many things at the mall use energy. Electric lights, infrared faucets and air-conditioners need electricity to work. One way to save energy is by keeping lights clean. More and more dust and dirt make the lights less bright. When malls keep lights clean, they can use fewer lights and keep the area just as bright ,Using fewer lights means using less energy.
You step up to the water faucet. The water starts to flow. You don't have to touch a thing. Why do malls have such fancy faucets?. The answer is simple. They save water. Sometimes people forget to turn the water off after they wash. Infrared faucets turn themselves off.
The…
1.________is a hot topic for a big mall.
A．To spend money B．To save energy
C．To keep the mall bright D．To buy things
2.Malls use infrared faucets mainly because________
A．they save water B．they are fancy C．they are simple D．they turn themselves off
3.Which of the following cannot save energy?
A．Using fewer lights. B．Using infrared faucets.
C．Using air-conditioners D．Keeping lights clean.
4.What will the fourth paragraph probably talk about?
A．How to save water when using infrared faucets in the mall
B．How to save energy when using air-conditioners in the mall
C．How to save money when shopping in the mall.
D．How to spend money when shopping in the mall.
5.The best title for the passage is_________
A．Lights, faucets and air-conditioners
B．Spending less money
C．Energy saving at the mall
D．A hot topic
Working parents feel that they are not giving their children enough care. They think that their children feel 1 and 2 to spend more time with them.
Scientists in some colleges have found that working parents believed that they knew 3 their children, but 4 had ever asked their children what they thought. So scientists interviewed (采访) over 1,000 children of working mothers or fathers to 5 what they wanted. They asked the children 6 they wanted their parents to stay 7 and some 8 questions．After they collected the answers, it was 9 that only 10% of the children in their study said that they wanted more time with their parents. _10_, the children who were interviewed said they wanted their parents to give more 11 to them. They said that their parents were as 12 as a bee. When they were asked about what they 13 most, a large number of the children said that they wanted to feel important and 14 .
So parents should know what their children really want and how to get along 15 with them.
1. A．tired B．afraid C．unhappy D．worried
2. A．think B．let C．ask D．want
3. A．of B．at C．about D．over
4. A．every one B．someone C．anyone D．no one
5. A．try out B．find out C．take out D．put out
6. A．whether B．why C．when D．how
7. A．behind B．at home C．away D．up
8. A．other B．others C．the other D．the others
9. A．surprising B．important C．necessary D．useful
10. A．But B．Also C．However D．too
11. A．food B．care C．money D．practice
12. A．small B．young C．lazy D．busy
13. A．talked B．learned C．needed D．studied
14. A．loved B．hated C．complained D．troubled
15. A．good B．nice C．fine D．well
―Have you finished your project?
―______ It’ll take me another two days.
A．Not yet. B．Yes, I have. C．Why not? D．No problem.
All the preparations for the task _____, and we’re ready to start.
A．completed B．complete
C．had been completed D．have been completed
