阿摩線上測驗
13. According to paragraph 4, what was one of the main causes of the drop in birth rates?
(A) The improvements in hygiene
(B) The lack of agricultural work
2
(C) The development of urbanization
(D) The superior environment
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統計： A(13), B(12), C(51), D(5), E(0) #2685827
統計： A(13), B(12), C(51), D(5), E(0) #2685827
