How many people will come to Beijing for the Olympic Games in 2008?

? 　　　— It’s hard to say. _______ people, I think.

A. Million of?? B. Millions of?? C. Two millions of? D. Two million of

How many people will come to Beijing for the Olympic Games in 2008?

  　　　— It’s hard to say. _______ people, I think.

        A. Million of   B. Millions of   C. Two millions of  D. Two million of

An astronaut’s work may sound exciting, but living in space isn’t as fun as you think. The website www.space.com lists the disadvantages of living in space. Here are some of them.

When astronauts work outside the station during spacewalks, they have to wear special gloves. The gloves are very tight. They can hurt the astronauts’ fingernails(手指甲) and even make them fall off.

In space, you don’t have many choices in what you eat. It’s hard to get fresh fruits and vegetables. It is not OK to eat bread because it leaves crumbs(碎屑). Crumbs could fly around everywhere.

In space, it is impossible to have a good shower because water can fly all over the ship and break the machines. Astronauts have to use a special water-shooting(喷水) gun and a washcloth.

Astronauts lose their bone strength quickly during their stay in space. So far, there is no way to solve this problem. They do exercise while they’re in space to try to keep their bones strong as long as possible.

Perhaps the hardest part of life in space is the feeling of loneliness. Astronauts sometimes have to spend weeks and even months away from Earth. They miss their friends and families.

1.People often think the life in space is       .

A. terrible                   　　B. lonely             　　　C. hard            　　　　D. fun

2.What may hurt astronauts fingernails while working in space?

A. Washcloth.                                     B. The special gloves.               

C. The water-shooting gun.                    D. Crumbs.

3.. How do the astronauts have a good shower in space?

A. By eating bread.                                                

B. By breaking the machines.             

C. By using a special water-shooting gun and a washcloth.   

D. By wearing gloves.

4. How do the astronauts keep their bones strong in space?

A. By taking medicine.                            B. By doing exercise.              

C. By taking a good rest.                    D. By walking in space.

5. What’s the hardest part of life for astronauts in space?

A. They feel very lonely.              B. They have to stay alone in space.      

C. They have no friends.                   D. They have no families.

Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!

   Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.

"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."

   British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.

   But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.

  Will there be a better indicator than litmus paper? The three kids decided to try and find out!

    How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.

   The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper!

"It's our first scientific journey, Huang said, "But it makes me want to try harder."

1. Whom did the three kids want to challenge?

A. Their chemistry teacher.     B. Their headmaster.

C. Robert Boyle              D. Thomas Edison

2. From the text, a red cabbage is a kind of ____.

A. plant　　B. animal　　C. paper　　D. liquid

3.What is widely used as the acid-base indicator now?

A. red cabbage              B. litmus paper

C. any plant                D. any flower 

4.The story mainly tells us ____.

A. how to make litmus paper    B. about the three kids' spirit

C. scientists were wrong        D. the kids are heroes