Read the text and fill in the gaps with the correct form of verbs and subject-verb agreement as per context. 

People who (a) _____ (appear) most often and most gloriously in the pages of history (b) _____ (be) great conquerors and generals. Whereas, the people who really (c) _____ (help) civilization forward are often never (d) _____ (mention) at all. We do not know who first (e) _____ (set) a broken leg or (f) _____ (launch) a sea worthy boat or (g) _____ (calculate) the length of a year. The great men are those who (h) _____ (work) ceaselessly to quicken the pace of civilization. On the contrary, the condemned men are those who (i) _____ (cause) bloodshed and violence in the world. All of us praise the great men of the world. We are highly indebted to those great men who contributed a lot to (j) _____ (flourish) the civilization.