1. The writer mainly wants to tell his readers that the space is full of _____.
A. rubbish B. danger C. satellites D. radiation
2. How much does space rubbish take up of all the man-made flying objects?
A. 30% B. 40% C. 50% D. 60%
3. Which of the following statements is true according to the passage?
A. Some children have been born in space.
B. People are not supposed to live in space.
C. Some people are eager to have a space trip.
D. No one is dealing with space rubbish now.
4. The underlined word fragments in the third paragraph probably means _____.
A. broken pieces B. flying dust C. dangerous gases D. space radiation
5. What is the main purpose(目的)for writing the passage?
A. To ask people not to pollute the space environment.
B. To develop peoples interests in space travel in the future.
C. To tell readers what scientists are doing about space rubbish.
D. To tell people that space is dangerous and what the dangers are.
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