13 , such generalizations are often backed by little proved data. Some studies have found that children obesity is 14 related to the hours of television viewed, but other studies have failed to establish such a 15 . Furthermore, these observations 16 the economic and social 17 forces 18 the changes in diet and lifestyle, and the intense pressures caused by increasing working hours and 19 living standards for the majority of working people. In general, such simplistic approaches serve to 20 the underlying social causes.
1. A. like
B. unlike
C. likely
D. alike
2. A. problem
B. significance
C. concern
D. reason
3. A. led