6. for the earl settlers on Mars

5. if/whether there will be many people willing to travel to Mars

4. that robots will do most of the work

3. will be able to fly at half the speed of light

2. started with a discussion about the relationship between study and hobbies

1. get ill from living on Mars

6. inside　 7. special　 8. of　　 9. miss　　 10. sick

1. useful　 2. after　　 3. familiar　 4. breathe　　 5. microphone　

6. take exams 7. connecting to 8. in the form of pills