阿摩線上測驗
12. UFO sightings have puzzled government officials and ______ for decades as many seek to answer the question: Are we alone?
(A) witnesses
(B) generals
(C) skeptics
(D) lone wolves
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統計： A(1), B(0), C(1), D(0), E(0) #3458778
統計： A(1), B(0), C(1), D(0), E(0) #3458778
