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He (has been in the army)for 3 years.

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He (has been in the army)for 3 years.
He _______for 3 years.
B.has been in the army
D.has served the army
D为什么不可以?
He _______for 3 years.
B.has been in the army
D.has served the army
正确答案B
D为什么不可以?
答:serve作"服役" 解时是不及物动词,D改为:has served in the army.
例:
Battalion Leadership - ROTC
MSG VanDenBroeck has served in the ARMY for over 18 years of service in Special
Forces. He completed 2 tours in Afghanistan with the 3rd Special Forces ...