49.a“Keep the Drive” in the second paragraph is a driving education program organized by
_______________.
(A) teenagers
(B) concerned parents of teenagers
(C) school teachers
(D) the police
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統計: A(10), B(3), C(2), D(0), E(0) #802377
統計: A(10), B(3), C(2), D(0), E(0) #802377