My uncle bought me an iPhone for my birthday.A. twelveB. twelfthC. the twelveD. the twelft

问题补充：

My uncle bought me an iPhone for my birthday.

A. twelve

B. twelfth

C. the twelve

D. the twelfth

答案：

A. twelve

B. twelfth

C. the twelve

(答案→)D. the twelfth

解析：序数词用法。序数词前应用定冠词the,根据句意：在我第十二个生日时，我的叔叔给我买了一个iphone手机。所以应为“the twelfth”.