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You must have waited here for a long time ,___________you?
A．mustn’tB．didn’tC．haven’tD．hadn’t
C
考察反意疑問句， must表猜測時其反意疑問句要和must后的動詞保持一致�！澳憧隙ǖ攘撕荛L時間，是嗎？”，由于沒有過去時間狀語所以答案C。
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