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1 Either a a fox or a bee can flyNeither 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 centuryBoth  computers and  cell phones  were invented in the 20th century3   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  aircrafts5 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 computers8   Either a star or a eclipse is  heavenly bodies.   Neither eclipses  nor constellationы are  heavenly bodies. B oth 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.