阿摩線上測驗
30. We provide a discount of 30% on ___ of not less than 200.
(A)qualities
(B)quantities
(C)numbers
(D)amounts。
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統計： A(4), B(58), C(1), D(13), E(0) #752286
統計： A(4), B(58), C(1), D(13), E(0) #752286
