Stressful environments lead to unhealthy behavior such as poor eating habits, which ____ increases therisk ofheart disease.[ ]

keep on coughing. What’s the matter— Oh, I’ve got a cold. Nothingserious, ____.

_______ you got to know my telephone number— Through a friend of yours

ne knows that Canada is the secondlargest country in the world, larger than _____ country in Asia.

I had __________ unusual experience last week.