The main subject of the talk last time was ______ of early agriculture-based society.

As the American people have become increasingly conscious of good (34) habits, their attitudes toward smoking have changed. Nonsmokers are demanding the right to (35) smokeless, nontoxic air, especially since recent studies have (36) that secondhand smoke, that is, the cigarette smoke in the air, is (37) dangerous. (38) , the demands of antismoking advocates are getting re-suits. Some cities, such as Eugene, Oregon, have already passed strict laws that re-quire restaurants to provide nonsmoking (39) . It seems that smoking is no longer considered (40) acceptable behavior by many in American society.

As the American people have become increasingly conscious of good (34) habits, their attitudes toward smoking have changed. Nonsmokers are demanding the right to (35) smokeless, nontoxic air, especially since recent studies have (36) that secondhand smoke, that is, the cigarette smoke in the air, is (37) dangerous. (38) , the demands of antismoking advocates are getting re-suits. Some cities, such as Eugene, Oregon, have already passed strict laws that re-quire restaurants to provide nonsmoking (39) . It seems that smoking is no longer considered (40) acceptable behavior by many in American society.