6. Antibiotic is a drug produced by certain microbes.

7. Antibiotics destroy other microbes that damage human tissues. They are used to treat a wide variety of diseases, including gonorrhea, tonsillitis, and tuberculosis.

8. Overuse or misuse of antibiotics can lead to the development of superbugs, which are pathogenic microbes that are resistant to antibiotics.

9. Yes, there are passive voice constructions in the text. Five examples are:

1. "Resistance to antibiotics may be acquired by pathogenic microbes."
2. "The resistant microbes transfer genetic material to non-resistant microbes and cause them to become resistant."
3. "During antibiotic treatment, non-resistant microbes are destroyed, but resistant types survive and multiply."
4. "Streptomycin, which is used to treat tuberculosis, has caused kidney damage and deafness."
5. "When the antibiotics are overused, or misused, these drugs make a person sensitive being attacked by a superbug."

10. Other microbes that damage human tissues are destroyed by antibiotics.