27.A: How did you mess up so badly?
B: I don’t know. ______
(A) He works for human resources.
(B) I cleaned up the mess yesterday.
(C) I followed the instructions to the letter.
(D) Did you follow protocol?
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統計: A(44), B(199), C(467), D(49), E(0) #3108244
統計: A(44), B(199), C(467), D(49), E(0) #3108244