WHO INVENTED FIREWORKS?During the 10th century a Chinese cook (21) how to make explosive black powderwhen he (22) mixed three kitchen ingredientspotassium nitrate or saltpetre (a saltsubstitute used in the curing of meat), sulphur and charcoal.The cook noticed that if the concoction (23)when enclosed in the hollow of abamboo shoot, there was (24) tremendous explosion.Fireworks arrived in Europe in the (25)century and were first produced(26)the Italians. The (27) recorded display was in Florence and the firstrecorded fireworks in England were at the wedding of King Henry VII (28)1486.The word 'bonfire' is said (29) from 'bone-fire', from a time when the corpsesof witches, heretics and other nonconformists were burned on a pyre instead of (30)in consecrated ground.