Variant-1 share your ideas about the text from the history of aviation

IV. Match the words with their definitions:

1. to invent	a) exceptionallygood
2.development	b) a type of aircraft which derives both lift and propulsion from one or more sets of horizontally revolving overhead rotors. It is capable of moving vertically and horizontally, the direction of motion being controlled by the pitch of the rotor blades.
3.knowledge	c) a person who manufactures articles of cast metal; the owner or operator of a foundry
4.scientific	d) create or design (something that has not existed before)
5.outstanding	i) a person who operates the flying controls of an aircraft.