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A. The area is under construction.
A 这个地区正在建设中。
B. The buildings look exactly the same.
B 这些楼看上去都一样。
C. The fence is being put around the site.
C 这个地点外面都围着栅栏。
D. All the people are wearing safety hats.
D 所有人都戴着安全帽。
