阿摩線上測驗
3 The safety board found that the country has 35,000 miles of oil, natural gas and _________ liquid pipelines, many of which are decades old and need immediate maintenance.
(A) virtuous
(B) hazardous
(C) prestigious
(D) indecent
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統計： A(9), B(25), C(9), D(4), E(0) #1670206
統計： A(9), B(25), C(9), D(4), E(0) #1670206
