—Does Li Ping serve in the army?—No, but he ________ in the army for five years. 
#104477
A
served
B
has served
C
is serving
D
would serve
推荐题目
—The door is still open.—How come? I mean, I _________ to lock it then.
#100493
A
remembered
B
would remember
C
remember
D
had remembered
By the time you arrive in Liverpool, we ___________ in France for two weeks. 
#102888
A
shall stay
B
have stayed
C
will have stayed
D
have been staying