4 There is a sale at the electronic store and all computers are ____________by 20%.
(A)overthrown
(B)discounted
(C) preserved
(D)restored
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統計: A(111), B(2492), C(112), D(65), E(0) #1571167
統計: A(111), B(2492), C(112), D(65), E(0) #1571167