— It’s difficult for the village children to cross the river for school.

— I hear a new bridge _______ over the river in a year.

A．was built

B．is being built

C．has been built

D．will be built

根据上下文内容，扩展画横线的句子。不超过60字。

城市书展，对外展现城市精神，对内体现市民素质。逛书展，书香扑面而来，那氤氲的文化氛围具有无穷魅力，感染着整座城市。

答： ______________________________________________________________