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48.She ______ a college student for more than a year A.became B.has become C.is D.has been

题目详情
48.She ______ a college student for more than a year A.became B.has become C.is D.has been
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答案和解析
D
现在完成时中,与一段时间的状语连用时,不能用瞬间动词,所以B错误