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

问题补充：

---Have you moved to new flat?

---Not yet, the building is under construction.

A. a; the

B. the; /

C. / ; /

D. /; the

答案：

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。