阿摩線上測驗
4 The irregularities may have retarded, but they had not ___________ , the growth in the volume of trade at the port.
(A) prevailed
(B) prevented
(C) protected
(D) proven
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統計： A(37), B(140), C(13), D(12), E(0) #1809838
統計： A(37), B(140), C(13), D(12), E(0) #1809838
