—I called you yesterday. A woman answered, but I didn’t recognize her voice. —Oh, it______my aunt Jean.

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问题 —I called you yesterday. A woman answered, but I didn’t recognize her voice. —Oh, it______my aunt Jean.

选项 A、must be
B、must have been
C、might be
D、can have been

答案B

解析对过去情况的肯定推测应用“情态动词+have+过去分词”，且根据句意，可以推断B项为正确答案。注意：can表示推测时通常不用于肯定陈述句。

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