How long has your brother in the army? [ ] A. served B. joined C. taken part D.
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How long has your brother ________ in the army?
[ ]
A. served B. joined C. taken part D. being
试题答案
答案：A
How long has your brother ________ in the army?
[ ]
A. served B. joined C. taken part D. being
答案：A