单项选择题
According to the passage, bicycles （）
A．are more convenient than cars B．are safer traffic tools than cars C．are ridden by most people in U.S. D．are the solution to some city problems
单项选择题 According to the author （）
单项选择题 "Bicycle lanes" (Line 2, Para.3) probably means （）
单项选择题 What reason does the author give for Washington not going to college（）
