Fill in the gaps with a suitable word

6. Jupiter is by far the largest p__________ in our solar System.

7. The planet Mars was first e__________ in the 1970s.

8. My phone b__________ was dead, so I couldn’t call anybody.

9. In the near future many i__________ diseases, such as AIDS and cancer, will be cured.

10. The planets in our solar System are divided into two groups - the inner planets and the o__________ planets.