阿摩線上測驗
47.What made the passenger pigeon unique?
(A) Its decreased population
(B) Its custom of traveling in large groups
(C) Its winter migration habits
(D) Its sudden appearance before a storm
答案：登入後查看
統計： A(4), B(23), C(6), D(2), E(0) #2705346
統計： A(4), B(23), C(6), D(2), E(0) #2705346
