問題詳情

21.Earth is now the only place for us to live on. Maybe someday, it will be ____ for people to live on Mars.
(A) possible
(B) excited
(C) wonderful
(D) safe

參考答案

答案：A
難度：非常簡單1
統計：A(1),B(0),C(0),D(0),E(0)