---Does your brother serve in the army?---No not now. But he in the army for 8 years.A.

问题补充：

---Does your brother serve in the army?

---No, not now. But he in the army for 8 years.

A. would serve

B. was serving

C. had served

D. served

答案：

A. would serve

B. was serving

C. had served

(答案→)D. served

解析：

这题考查时态，句意是：--你哥哥在军队服务吗？--不，不是现在，但是他在军队8年。在军队8年属于过去的时间，选D。