还原句子

Babies sleep for up to eighteen hours a day. Sleep. No one can live without it. 71_____ Research (研究) by the National Sleep Foundation in Washington says that we all need eight hours' sleep every night. Scientists have found that people who sleep for less than six and a half hours a night are more often ill than people who sleep for eight hours. 72

____"Workaholics" (工作狂) who sleep for less than five hours often die young, and do less well at work. It also says that the idea that we need less sleep as we get older is untrue. " People have no idea how important sleep is to their lives," Dr. Thomas Roth, director of the Foundation says. "

73______ .

. "But not too much of it,” says Professor Jim Home. "Sleep is like food and drink," he believes:" 74 ______"Professor Home studied a group of people who could spend as many hours as they wanted in bed; after ten hours they didn't find it any easier to get up in the morning. And people who sleep for more than nine hours a night die younger than people who usually sleep for seven or eight.

A. But how much do we really need?

B. You would always like to have a little bit more, but that doesn't mean you need it.

C. Good health needs good sleep.

D. Going without sleep also increases the chance of illness.

75. What's the best title for this passage?

A. Children and Sleep

B. The Secrets of Sleep

C. Sleep and Work

D. Are You Having Enough Sleep?

71. A 72. D 73. C 74. C 75. B

I think life will be very different in one hundred years’ time. Some things will be better and some things will be worse.

Firstly, people won't live on the surface(表面)of the earth. 71 Special machines will provide oxygen (氧气)and light but the environment won't be the same. Trees and plants won't grow because there won't be any soil. 72 Food will mainly be in the form of pills( 药丸). If the sea isn't too polluted, people will also eat fish. What is more, I think people's everyday life will be different. 73 No one will have to do housework either. So, people will have more free time and they will be able to enjoy the things they like—sports, for example. Finally, I believe that everyone will be able to travel to the moon, to other planets and perhaps even to other galaxies(星系) for a holiday.

In conclusion(总之) , 74 Whatever happens, though, I'm sure the future will be an interesting place to live in.

A. They won't have to work long hours because computers and robots will help them.

B. Our cities will be under the sea, in large domes (圆顶屋).

C. I think that life in the future won't be anything like it is now.

D. As a result, people won't be able to grow crops.

( )75. What is the best title of the passage?

A. Life under the sea

B. The future world

C. Future life in my mind

D. An interesting place to live in

BDACC

Forests are large pieces of land covered with big trees. They are found all over the world, especially in places where there is enough sunshine and much rainfall.

71 To build a house, we need wood for doors and windows. Beautiful chairs and tables are also made of wood.

Teak (柚木) wood is very useful for ship-building. It is used for all parts of a ship where wood and metal come in contact (接触), for it has a kind of oil to keep metal away from rust (铁锈). 72 For this, teak wood is an important railway building material.

Forests are no less important than useful. They are the home of wild animals. Without them, those animals would run among the places where we live and work.

73

Forests are helpful to weather, too. When it is very hot, they can be a good place for people to stay away from the sun. In winter, they can keep us from the cold. Forests can also stop the land from being washed away by heavy rain for the trees hold the soil together.

74

A. There would be no peace for man.

B. So it would be foolish to cut down trees freely.

C. Many kinds of materials(材料) come from forests.

D. It can also stop the attack (攻击) of white ants and other insects.

75.What’s the best title for the passage?

A. Forests and Animals

B. Forests are all Over the World