It’s widely known that first aid is      important and you can save lives if the right action is taken.

The famous professor’s lectures, though ____ informal, are considered far more informative and interesting.

I shall certainly not tell him the news. ________, it will go to his ears sooner or later. 

Do you think shopping online will________take the place of shopping in stores?

Our bodies are strengthened by taking exercise,______ our minds developed by learning.