a)having proved b)proving c)to prove that all

He did not a)as legend says b)as stories say c)as people say drop cannon balls from the Leaning Tower of Pisa

Galileo a)instead b)also c)therefore made some important discoveries in mechanics

too that the earth was not the fixed centre of a)an b)a c)the universe as Ptolemy had said.

and made other people a)to see b)see c)seeing 

He saw a)by b)from c)with his own eyes