問題詳情
10. For years, SpaceX _______ disrupt the space market by developing rockets thatcould fly to space, and then land so that they could be reused.
(A) has attempted
(B) is attempting to
(C) has been attempted to
(D) has been attempting to
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