27.—I started to study, but then a friend called. —That's no excuse ________.
(A) for not studying
(B) not for studying
(C) not studying
(D) not to studying
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統計: A(0), B(1), C(0), D(0), E(0) #529968
統計: A(0), B(1), C(0), D(0), E(0) #529968