18. According to the article, what makes it easy for people to travel around New York City?
(A) Modern roads and highways.
(B) Cheap taxis everywhere.
(C) Convenient bus network.
(D) Underground transit railway.
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統計: A(2), B(0), C(0), D(8), E(0) #4036322
統計: A(2), B(0), C(0), D(8), E(0) #4036322