There could be many possible ways of completing these fragments correctly. One way of adding information to expand three of the fragments presented into complete sentences, using correct capitalization and punctuation, is:
Advertising in the local newspaper and giving speeches in public places are good ways of getting to be known by the people.
The candidates on television night and day would comment on the necessary changes that could improve the country.
After the election, we were very hopeful that things would improve in the economic and environmental areas.