問題詳情

24.“We are approaching some turbulence. For your safety, please keep your belts __________ until the ‘seat belt’sign goes off.”
(A) fasten
(B) fastened
(C) fastening
(D) be fastened

參考答案

答案：B
難度：簡單0.730769
統計：A(2),B(19),C(0),D(3),E(0)