1) Before the invention of ....... people ....... a) used to travel on foot and horses b) used to fly 2) Before the invention of ....... people ....... a) would like to be in darkness b) used to use candles to light houses 3) Before the invention of ....... people ....... a) used to have live communication more b) didn't use to communicate 4) Before the invention of ....... people ....... a) would go to libraries b) didn't read books 5) Before the invention of ....... people ....... a) used to make mistakes b) used to calculate in mind 6) Before the invention of ....... people ....... a) would make their clothes clean by hands b) didn't use to wash their clothes

SO_Upper_5_lead in: Inventions

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