41. What is Paragraph 1 mainly about ?
(A) A description of cities.
(B) Why American cities are changing.
(C) The problems with American cities.
(D) The important of American cities.
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統計: A(157), B(69), C(39), D(11), E(0) #651103
統計: A(157), B(69), C(39), D(11), E(0) #651103