問題詳情
21. Now, ____ the wake of the two deadly crashes involving the same jet model, Boeing will makeone of those safety features standard as part of a fix to get the planes in the air again.
(A) in
(B) at
(C) for
(D) with
參考答案
答案:[無官方正解]
難度:計算中-1
書單:沒有書單,新增