【答案解析】[解析] A. The parking lot is full. B. There's an overpass across the freeway. C. Traffic is stopped in both directions. D. The commuters are riding the bus.
【答案解析】[解析] A. The man is waving to the cyclists. B. He's raising his arm above his head. C. The man is directing traffic. D. He's pointing out the problem.