12. As the only ____for the murder, Tom spent time explaining what he saw to the police.
(A) witness
(B) customer
(C) magician
(D) settler
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統計: A(366), B(46), C(31), D(46), E(0) #1406308
統計: A(366), B(46), C(31), D(46), E(0) #1406308