85 urban economies still provide many 86 that rural areas do not.. [(A)] came on [(B)] came off [(C)] came over [(D)] came out

57. By “a one-way street” (Line 1, Para. 1), the author means ________. [(A)] university researchers know little about the commercial world [(B)] there is little exchange between industry and academia [(C)] few industrial scientists would quit to work in a university [(D)] few university professors are willing to do industrial research