Complete the sentences with the words: an inventor, food, rockets, space suits, space flight, multi- stage boosters, research, the final frontier, air, a rocket scientist, airlocks. Konstantin Tsiolkovsky (1857-1935). 1)Tsiolkovsky is the father of human 1) .... He was 2) ..., 3) .... He was a pioneer in space 4) ... . He worked out the designs for 5)... with thrusters, 6) ..., 7) ... , satellites. He worked out 8) ... and a system for providing 9) ... and 10) ... to a space station. He was a man years ahead of his time. It is thanks to him Russia was the first nation to cross 11) ... ."}