【题目】 Scientists think that there has been life on the earth for hundreds of millions of years. However, we haven't found life on other plants yet. Why not?

The Earth is a planet and it goes around the Sun. Seven other planets also go around the sun. None of them has an environment with air, so people and living things cannot grow. The Sun and its planets are called the solar system(太阳系). The solar system is a small part of our galaxy(星系).

But scientists have discovered many other galaxies in the universe. But they are far away and their light has to travel for many years to reach us. It is hard to understand how large the universe is.

So far, scientists have sent lots of spaceships to look at other plants in our solar system, and some spaceships have gone beyond the solar system. However, no one has discovered any life in space yet.

But why has no one from other plants sent us a message? Have they tried to send information to us? With so many stars in the universe, are we alone, or is there life out there in space? We don't know yet.

1How many planets go around the sun?

A.SevenB.EightC.NineD.Ten

2In order to look at other planets in the solar system, scientists have sent many________.

A.e-mailsB.planesC.spaceshipsD.messages

3_______ has found life on other planets.

A.No oneB.A scientistC.A travelerD.A student

4Which of the following is TRUE?

A.All the planets have an environment with air.B.It’s easy to know how large the universe is.

C.There is only one galaxy in the universe.D.The solar system includes the sun and its planets.

5The best title of this passage should be ________.

A.The MoonB.The Solar SystemC.The Stars at NightD.The Sun

【题目】 When we exercise hard, we burn fat. But have you ever wondered where exactly the fat goes?

Some doctors think that fat is changed into heat and released in the air. Others think the body burns it. Some even joke that the fat fairy comes and takes it. That is why you always weigh less in the morning.

Now a new study from the University of New South Wales in Australia reveals the mystery. “the correct answer is that most of the mass is breathed out as carbon dioxide(二氧化碳). It goes into thin air,” says the study’s lead author, Ruben Meerman, to Science Daily. Scientists followed the atoms(原子) in 10 kilograms of fat as they are lost. They found that 8.4 of those kilograms are breathed out as carbon dioxide through the lungs. The rest of the weight —1.6 kilograms— becomes water that leaves the body in the form of fluids(液体) such as urine(尿), sweat, breath and tears. “None of this is obvious to people because we can’t see the carbon dioxide gas we breathe out,” said Meerman.

Does that mean you can lose more weight by breathing more? It is not as easy as you think. Breathing more than the body’s metabolic rate(新陈代谢) can make you uncomfortable. You may feel dizzy and become unconscious(无意识的), according the study. So how to lose weight healthily? The key is to eat less and move more. You many have heard this many times.

During a day, a 70kg person breathes out about 200g of carbon dioxide. So if the same person wants to lose weight, he or she can do some light exercise, for example, jogging. This can help lose 240g of carbon dioxide.

1According to the new study, where does our fat go when we exercise a lot?

A.It is changed into heat and given off in the air.B.The body burns it.

C.The fat fairy comes and takes it.D.Most of it is breathed out as carbon dioxide.

2What will happen to people if they breathe more than the body’s metabolic rate?

A.They will put on more weight.B.They will feel comfortable.

C.They may become unconscious.D.They may not lose weight at all.

3Which of the following is a better way to lose weight?

A.Sitting still and breathing more.B.Sleeping a lot and breathing a lot.

C.Eating less and exercising more.D.Eating more and doing some light exercise.

4Which is true according to the study from University of New South Wales?

A.The fat is changed into heat and released in the air.

B.Most of the kilograms of fat as they are lost are breathed out as carbon dioxide.

C.People can see the carbon dioxide gas we breathe out.

D.If we breathe more than the body’s metabolic rate, we will feel good.

5During a week , how much carbon dioxide does a 70kg person breathes out?

A.240gB.200gC.1400gD.1680g

【题目】 When Will Restall was in fifth grade, he received bus safety training at school. Local bus drivers taught students about how to use the buses’ two-way radios. A two-way radio is a radio that can both send and receive message. 1 . And they show the students how to use them in emergency (紧急的) situation. Will used what he learned to help a hurt bus driver get quick medical treatment. People in his hometown now call the 11-year-old a hero for his brave actions.

Will was taking the school bus to school one morning.2. He had to wait 10 minutes or so before he could get off the bus.

But then he heard a loud noise and looked up to see what happened. 3. She had passed out and fell over on the bus’ stairs.

Will left his seat, grabbed the two-way radio and reported that the driver was hurt.

4Soon, another bus driver and an ambulance (救护车) arrived to help. When they got there, the bus driver was awake and sitting up, but not speaking. They sent the driver to the hospital. Will and everyone else on the bus went to class as usual. Will’s brave actions attracted a lot of attention.5, although he didn’t want to be the spotlight (公众注意的焦点).

“I had to ask him,” said his father, Tim Restall.

A.Like every other student on the bus, Will was playing a video game on his phone

B.A local TV station even interviewed him

C.The user can both talk and listen, it’s also called walkie-talkies (对讲机)

D.He saw that the bus driver was no longer in the driver’s seat

E.The radio on each bus let Will’s friends hear him report the emergency

F.They were interested in how to use the two-way radio.

G.He found the bus running too fast.

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