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 The best title for this passage is （）
单项选择题 The idea of special bicycle lanes is most favored by （）
单项选择题 "Bicycle lanes" (Line 2, Para.3) probably means （）
