There are in this building I live on .A. nine floors the ninth floorB. nine floor the

问题补充：

There are in this building , I live on .

A. nine floors ,the ninth floor

B. nine floor, the ninth floor

C. nine floor , nine floors

D. ninth floor,the ninth floor

答案：

(答案→)A. nine floors ,the ninth floor

B. nine floor, the ninth floor

C. nine floor , nine floors

D. ninth floor,the ninth floor

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