Because the eyes of the owl are fixed in their sockets, the owl ________ its head to focus on an object. (A) must turn (B) turn (C) turning (D) who must turn答案為a,講原因，并翻譯一下，謝謝！
熱心網友
A情態動詞“must”的用法.當must 用作推測性情態動詞時，表示“邏輯必然”
熱心網友
A，用情態動詞！
Because the eyes of the owl are fixed in their sockets, the owl ________ its head to focus on an object. (A) must turn (B) turn (C) turning (D) who must turn答案為a,講原因，并翻譯一下，謝謝！
A情態動詞“must”的用法.當must 用作推測性情態動詞時，表示“邏輯必然”
A，用情態動詞！