Internet use appears to cause a decline in psychological well-being, according to research at Carnegie Mellon University. Even people who【C1】______just a few hours a week on the Internet【C2】______more depression and loneliness than those who logged on less【C3】______, the two-year study showed. And it wasn't that people who were already feeling【C4】______spent more time on the Internet, but the using the Net actually【C5】______to cause the bad feelings. Researchers are puzzling over the results,【C6】______were completely contrary to their【C7】______. They expected that the Net would prove socially【C8】______than television, since the Net【C9】______users to choose their information and to【C10】______with others. The fact that Internet use has【C11】______time available for family and friends may【C12】______for the drop in well-being,【C13】______hypothesized(假设). Faceless, bodiless virtual communication may be less psychologically satisfying than actual【C14】______, and the relationships formed through it may be【C15】______. Another possibility is that exposure【C16】______the wider world via the Net makes users【C17】______satisfied with their lives. 'But it's important to remember this is not about the technology itself it's about【C18】______it is used,' says psychologist Christine Riley of Intel, one of the study's sponsors. It really points to the need for considering social【C19】______in terms of how you design applications and services【C20】______technology. 【C1】