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- I phoned you yesterday morning. A girl answered, but I didn’t recognize the vo

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- I phoned you yesterday morning. A girl answered, but I didn’t recognize the vo

— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.

— Oh, it __________ my younger sister. She was in my room at that moment.

A.must have beenB.should have been
C.could have beenD.may have been

试题答案

A