______ [originaltext]Sentence No. 1 The average age of people in the countrysid

Sentence No. 1 The average age of people in the countryside is increasing, while that of the cities is falling. More old people stay in the countryside than young people and the opposite is true in the cities.
Sentence No. 2 One important reason for the move to cities has to do with quality of life issues: comfort and convenience. For example, most of us would like our children to receive a good education, and cities often offer better schools.
Sentence No. 3 Most burglars are opportunists looking for an easy break-in, so don’t make things simple for them. Don’t advertise the fact that you’re out or away, or be careless about security.
Sentence No. 4 Researchers from the University of Copenhagen and the University of Iceland said ash particles from the early part of the volcanic eruption are especially abrasive, posing a possible threat to aircraft engines.
Sentence No. 5 Lack of sanitation leads to widespread contamination of drinking water. Recent statistics say water-associated infectious diseases claim up to 3. 2 million lives each year, approximately 6% of all deaths globally.