---Have you moved to new flat?-Not yet, the building is under construction.A. a; theB

---Have you moved to new flat?
---Not yet, the building is under construction.
A. a; the
B. the; /
C. / ; /
D. /; the

A. a; the(答案→)B. the; /C. / ; /D. /; the解析：考查情景交际和冠词。“你已经搬到那个新公寓了吗？”“还没有，那栋大楼正在建设中。”此处特指那个新公寓，用the；under construction是固定搭配，“在建设中”。故选B。

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