英语题目,高手进.Where____therecorder?Ican'tfinditanywhere.I____itrightherebutnowit'sgone.A.haveyouput;putB.didyouput;haveputC.hadyouput;wasputtingD.wereyouputting;haveput这题的答案是A,但是我想请问下,

　　英语题目,高手进.

　　Where____therecorder?Ican'tfinditanywhere.

　　I____itrightherebutnowit'sgone.

　　A.haveyouput;put

　　B.didyouput;haveput

　　C.hadyouput;wasputting

　　D.wereyouputting;haveput

　　这题的答案是A,但是我想请问下,B为什么不行.