—I hear your uncle works in Beijing. Can you tell me ?—For 5 years.A. when he went thereB.

问题补充：

—I hear your uncle works in Beijing. Can you tell me ?

—For 5 years.

A. when he went there

B. when he will go there

C. how soon he will come back

D. how long he has stayed there

答案：

A. when he went there

B. when he will go there

C. how soon he will come back

(答案→)D. how long he has stayed there

解析：句意：——我听说你叔叔工作在北京，你能告诉我他已经在那呆多长时间了吗？——五年。根据答语可知是问他在那已经呆了多长时间，故选D。