問題詳情

【題組】20. It can inferred from the discussion about ducksthat the molting of their flight feathers takes.
(A) a year
(B) a season
(C) several months
(D) a few weeks

參考答案

答案：D
難度：困難0.25
統計：A(1),B(2),C(0),D(1),E(0)