问题
选择题
He served in the army in _______ when he was in his twenties. [ ]
A. 1940's
B. 1940s
C. the 1940s
D. the 1940s'
答案
答案：C
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He served in the army in _______ when he was in his twenties. [ ]
A. 1940's
B. 1940s
C. the 1940s
D. the 1940s'
答案：C