阿摩線上測驗
42. According to the passage, which of the following activities is characteristic of the early part of the reproductive cycle of birds?
(A) Selecting a mate
(B) Collecting nest-building materials
(C) Playing with nest-building materials
(D) Building a nest
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統計： A(1), B(9), C(87), D(10), E(0) #1874601
統計： A(1), B(9), C(87), D(10), E(0) #1874601