The young Mr. Wang has ______ in the army for twenty years.

The young Mr. Wang has ______ in the army for twenty years.
A、serviced
B、served
C、maintained
D、stayed
【正确答案】：B
【题目解析】：service 服务，serve 招待，服役，maintain 维持，stay 保持，待。
句意：年轻的王先生已经在部队_____20年了.B 符合题意。在部队服役。