单项选择题

The more time children spend watching television the poorer they perform academically, according to three studies published on Monday. (47) television viewing has been blamed for increasing rates of childhood obesity (肥胖) and for aggressive behavior, while its (48) on schooling have been inconclusive, researchers said. But studies published on the topic in this month’’ s Archives of Pediatrics (小儿科) & Adolescent Medicine concluded television viewing (49) to have an adverse effect (反作用) on academic pursuits. For (50) , children who had televisions in their bedrooms--and (51) watched more TV--scored lower on standardized tests than those who did not have sets in their rooms. In contrast, the study found having a home computer with (52) to the Internet resulted in comparatively higher test scores. "Consistently, those with a bedroom television but no (53) home computer had, on aver age, the lowest scores and those with home computer but no bedroom television had the highest scores," wrote study author Dina Borzekowski of Johns Hopkins University. The American Academy of Pediatrics has (54) parents to limit children’’ s television viewing to no more than one to two hours per day--and to try to keep younger Children away from TV altogether. In two other studies published in the same journal, children who (55) watched television before the age of 3 ended up with lower test scores later on, and children and adolescents who watched more television were less (56) . to go on to finish high school or earn a college degree. WORD BANK A) Inadequate I) urged B) available J) Excessive C) regularly K) instance D) therefore L) reception E) access M) tended F) likely N) Ordinary G) impact O) Limitless H) converted