1. The mountainous area is barren, but on the other hand, it is ______ in valuable minerals.
(A) prolific
(B) feasible
(C) sterile
(D) penetrative
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統計: A(73), B(7), C(8), D(4), E(0) #1272671
統計: A(73), B(7), C(8), D(4), E(0) #1272671