48. You can call the technicians if the machine ______. They will come and fix it as soon as
possible.
(A)passes away
(B)gives up
(C)takes off
(D)breaks down
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統計: A(3), B(4), C(6), D(138), E(0) #2683373
統計: A(3), B(4), C(6), D(138), E(0) #2683373