单项选择题

A．must beB．must have beenC．might beD．can have been--I c……

--I called you yesterday. A woman answered, but I didn't recognize her voice.
--Oh, it （）my aunt Jean.

A．must be
B．must have been
C．might be
D．can have been

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单项选择题What（）you do this Sunday if it （）

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