1. What is the advantage of overhead bridges mentioned in this passage?
A.Taller trucks can pass under them.
B. Pedestrians can climb up and have a view of the city.
C.They are safer for pedestrians and can keep traffic moving at the same time.
D.They are easier and more convenient for the pedestrians.
出自:河北建筑工程学院-建筑工程技术(专科)-大学英语1