题文
—I can’t find Mary. Where is she?
—Sorry, I don’t know ____ .
| A．where has she been | B．where she has been |
| C．where has she gone | D．where she has gone |
—I can’t find Mary. Where is she?
—Sorry, I don’t know ____ .
| A．where has she been | B．where she has been |
| C．where has she gone | D．where she has gone |
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