121. The updated warranty covers mechanical defects for two years, ______ accidental damage is excluded.
(A) or
(B) so
(C) as
(D) but
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統計: A(19), B(83), C(62), D(239), E(0) #3823141
統計: A(19), B(83), C(62), D(239), E(0) #3823141