My brother an English teacher in ten years.A. wasB. isC. areD. will be

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A. was
B. is
C. are
(答案→)D. will be
解析：考察时态，句意：我的哥哥十年后会成为一名英语老师。in ten years表示十年以后，常用在将来时中。故本句为一般将来时态，选D。