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A. The area is under construction.
这片地区正在开发。
B. The buildings look exactly the same.
这些建筑看起来一模一样。
C. The fence is being put around the site.
正在这片选址周围搭建篱笆。
D. All the people are wearing safety hats.
D.所有人都带了安全帽。
