447. It is time the authorities concerned took proper steps to solve the traffic problems.

译文　该是有关当局采取适当的措施来解决交通问题的时候了。

点睛　It is time＋某人＋过去时从句，表示现在是该做某事的时候了。这个句型需要从句使用过去时表示虚拟语气，而主句it is则保持现在时态。如：It is time Mary（某人）thought（过去时，虚拟）about the future of you. （该是玛丽考虑你的未来的时候了）。the authorities concerned指“有关当局”。

句型拓展

It is time for the whole society to care about our senior citizens. 该是全社会关注老年人的时候了。

It is high time that the article were published. 是时候发表这篇文章了。