19. Who is a "Commuter"?
(A) A person who drives the train
(B) A person who repairs the train
(C) A person who travels some distance to work on a regular basis
(D) A person who designs metro stations
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統計: A(21), B(18), C(161), D(6), E(0) #3154195
統計: A(21), B(18), C(161), D(6), E(0) #3154195