选词填空。请根据文章内容,从下列连词中选择合适的词,填入文章的空格内 (注:答案填写字母ABCD即可,例如:如果答案选A. for another,则直接写字母A即可,不要写for another, 以免影响成绩!!) The Benefits of Television We hear a lot about the negative effects of television on the viewer. Obviously, television can be harmful if it is watched constantly to the exclusion of other activities. It would be just as harmful to listen to CDs all the time or to eat constantly. 1. _______, when television is watched in moderation, it is extremely valuable, 2. _______ it provides relaxation, entertainment, and education. 3._______, watching TV has the value of sheer relaxation. Watching TV can be soothing and restful after an eight-hour day of pressure, challenges, or concentration. In addition, watching TV seems to reduce stress in some people. One doctor, 4. _______, advises his patients with high blood pressure to relax in the evening with a few hours of television. 5. _______, television is educational. Preschoolers learn colors, numbers, and letters from public television programs, like Sesame Street, that use animation and puppets to make learning fun. Perhaps because television is such a powerful force, we like to criticize it and search for its flows. However, the benefits of television should not be ignored. A. first of all