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Frank often wears a mask ________he can keep fit in the foggy and hazy (霾) weather.

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　　Man has been traveling into space for more than forty years. Even though today, very few people get the chance to be an astronaut, about thirty per year. This is mainly because of the expense. It costs millions of yuan to train and send astronauts into space. Very few countries can afford this.

　　This why American businessman Dennis Tito paid 20000000 US dollars to the Russian space agency to go into space. He visited the International Space Station. His trip making him the first ever space tourist, took eight days in total. He spent most of his time taking photos, looking at earth and listening to music on his once-in-a-lifetime trip.

　　After landing safely back on earth, Mr Tito thought the trip was worth the money. The only difficulty he had was walking but this is normal for anyone who's been in zero gravity.

　　Some people especially in the American space agency, argue that you must be professional to go into space. They worried about the safety of other astronauts. However, Mr Tito received training before he left. He also helped to prepare food for the others while in space. They told him what to do and where he was allowed to go.

　　A survey carried out soon after Tito landed showed that seventy-five percent of American supported space tourism. Some people are bored of all the places on the earth. They are looking for a new adventure and space is the place.

　　The money Mr Tito gave the Russians paid for twenty percent of their annual budget. If we want to see men on Mars and other planets, we may need rich people like Mr Tito to help us pay for it. The Russians have more rich people who want to become space tourists. They should take them.

l．How many people have flown in space?

[　　]

A．About thirty.

B．More than one thousand and two hundred.

C．Thousands.

D．About twelve thousand.

2．The Russians want Dennis Tito to go into space because ________.

[　　]

A．they want to work with an American

B．they want him to have a once-in-a-lifetime trip

C．they want him to take photos of earth

D．they want his money

3．The differences between Mr Tito and the other astronauts ________.

[　　]

A．none

B．only Tito was allowed to cook

C．Tito couldn't go everywhere on the space station

D．Tito received training before he flew in space

4．What does the writer think about Dennis Tito?

[　　]

A．He helped Russia keep going into space.

B．He was not a good astronaut.

C．He couldn't help the Russians much.

D．He shouldn't be allowed into space again.

5．The writer thinks the problem for space tourists is ________.

[　　]

A．people's legs take time to get used to earth again

B．none

C．there is not much to do, only take photos and listen to music

D．tourists need to learn Russian before they go

If you put a buzzard(禿鷹) in a cage without a roof(頂棚), the bird will be a prisoner. Even though it can fly, it can’t fly through the open roof. The reason is that a buzzard always begins a flight from the ground with a run of 3 or 4 meters. Without space to run, he will not even try to fly, but will stay in his small jail(監(jiān)牢) for the rest of his life.
The ordinary bat that flies around at night cannot take off from the ground. If it is placed on the ground, all it can do is shuffle(穿梭) about helplessly. If it reaches a higher place, it will be able to throw itself into the air. Then it takes off quickly. But on flat ground, it will never fly.
A bee dropped into a cup will be there until it dies, unless it is taken out. It never sees the means of escape at the top, but keeps trying to find some way out through the sides near the bottom. It will look for away where none exists, until it completely destroys itself.
In many ways, there are lots of people like the buzzard, the bat and the bee. They are struggling with all their problems and frustrations(挫折)，not realizing that the answer is right there above them.
【小題1】A buzzard can’t fly through the open roof of a cage because       .