—You ______ for me this morning. I came over here with Michel in his car.
    —Well, why didn't you phone and let me know?
 
【正确答案】 A
【答案解析】 句意为“——今天早上你______我，我坐Michel的车来的。——那你为什么不早点打电话告诉我一声呢?”根据语境，空白处表示“你原本不必等我，实际上你却等我了”。needn't have done表示“本不必做某事却做了”，符合句意，故选A。