阿摩線上測驗
25 Because of the advanced medical technology, infant mortality_____ in the past thirty years.
(A) has fallen
(B) had fallen
(C) is falling
(D) was falling
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統計： A(62), B(45), C(8), D(11), E(0) #1526534
統計： A(62), B(45), C(8), D(11), E(0) #1526534
