阿摩線上測驗
38. A country is believed _____ a comparative advantage over another when it can produce a commodity more cheaply.
(A) to have
(B) having
(C) that it has
(D) to have had
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統計： A(247), B(85), C(101), D(49), E(0) #3436023
統計： A(247), B(85), C(101), D(49), E(0) #3436023
