96.Greed and a total lack of social consciousness have been cited a
s major reasons for the dramatic rise in corruption.
97.There are several reasons for the marked increase in China s crime rate-the dramatic influx of itinerant workers in urban areas; declining social values; and widening disparities between the haves and have-nots.
98.Why are an increasing number of elderly Chinese parents living apart from their children? One reason is the increasing upward mobility of the younger generation. Another is expanding social opportunities for the elderly. Perhaps the main reason，however，centers on dramatic changes in traditional concepts.
99.What has sparked the increasing interest in exercise? For one thing，people have gained a greater awareness of the need for physical fitness. For another，the constantly improving standard of living enables Chinese people to patronize the increasing number of recreational venues. The main thing perhaps centers on the healthcare and psychological benefits exercise provides.
100.Identifying the reasons for an emerging phenomenon which involves several complicated factors is far from an easy task. For example，some scientists attribute environmental deterioration to a series of natural factors，while others place the blame solely on inappropriate human behavior.