About half of indias children aged ------ (among,between,with,about)6 and 14 do not go to school.About 5.5 crore children -------(worked,working,has been working,work)in factories,cottage industries-----------(and,around,about,some)in the agricultural sector .One of the most important -------------(reason,reasons,)for our nation -------(backwardness,backwardsness,backness,backward)is literacy.