43.Susan had to walk five miles back to the office after realizing she ______ her wallet there.
(A) had left
(B) has left
(C) have left
(D) has been leaving
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統計: A(1481), B(332), C(174), D(266), E(0) #3108644
統計: A(1481), B(332), C(174), D(266), E(0) #3108644