48 There is no better way to learn about San Francisco and its history_______by taking a guided walking tour.
(A) than
(B) as
(C) or
(D) into
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統計: A(286), B(56), C(22), D(24), E(0) #345537
統計: A(286), B(56), C(22), D(24), E(0) #345537