49. In line 10, the word "rich" is used to mean that a trail is
(A) paved with precious materials
(B) a profitable business to get into
(C) a very costly undertaking
(D) filled with an abundance of clues.
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統計: A(0), B(2), C(0), D(9), E(0) #802987
統計: A(0), B(2), C(0), D(9), E(0) #802987