阿摩線上測驗
16.These cars must meet strict safety _____ before they are to be sold.
(A) stand
(B) strand
(C) standard
(D) station
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統計： A(8), B(26), C(43), D(10), E(0) #2262008
統計： A(8), B(26), C(43), D(10), E(0) #2262008
