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—I can’t find Mary. Where’s 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’s she?

—Sorry, I don’t know ______.

—I can’t find Mary. Where’s 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’s 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