Lesson b) Pupil A, ask pupil B about the invention of the clock and after your partner's answer circle the right option. 1 When was the first accurate clock designed? a) in 1657 b) in 1637 c) in 1700 2 When were shadow clocks first used? a) 3000 years ago b) 4000 years ago c) 2000 year ago 3 When were mechanical clocks made? a) in the 13th century b) in the 15th century c) in the 14th century 4 What kind of clocks were used in ancient Egypt? a) hourglasses b) water clocks 5 When were sand glasses used? a) in the Middle Ages b) after 1700 6 Where were the first wristwatches made? a) in England and Germany b) in France and Switzerland​