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1 Either a a fox or a bee can fly
Neither a dog nor a cat  can fly.
Both  eagles and sparrows can fly.

2
Either  a computer or a wheel was invented in the 20th century
Neither a wheel nor a bicycle were  invented in the 20th century
Both  computers and  cell phones  were invented in the 20th century

3   Either   a solid fuel rocket or  a water  can be used as fuel for space rockets
 Neither a petrol nor a gas can be used as fuels for space rockets
Both solid fuels rocket or   liquid fuels rocket can be used as fuels for space rockets.

4

Either  a helicopter or  an umbrella can be called an aircraft
Neither  parachutes nor  umbrellas can be called  aircrafts
Both  planes and  helicopters can be called  aircrafts

5
Either America or  New Zealand was discovered by the English
Neither America nor Alaska were discovered by the English.
Both New Zealands and Australia were  discovered by the English.

6
Either Russia or Australia is  in Southern Hemisphere
Neither Russia nor Germany are in Southern Hemisphere
Both Australia and New Zealand are in the Southern Hemisphere.

7
Either  cooking or  counting is done by computers
  Neither cooking nor dancing are done by computers.
Both purchases and sales are done by computers

8
  Either a star or a eclipse is  heavenly bodies.
 Neither eclipses  nor constellationы are  heavenly bodies.
Both stars and planets are heavenly bodies.

9)

Either a parrot or a dog can imitate human voices.
Neither  dogs nor  cats can imitate human voices.
Both  parrots and  white whales can imitate human voices.