【单选题】Now it is possible for ofo and Mobike to give everyone keys, and _________ them for their use.
【单选题】Whether this model can work on the vast and global scale that ofo and Mobike envision is not yet clear; that it is beyond anything Provo dreamed of is clear.
【单选题】_________ this model can work on the vast and great scale that ofo and Mobike _________ is not yet clear, that it is beyond anything Provo dreamed________ is clear.
A.
That......envision......of
B.
That......vision......out
C.
Whether......vision......in
D.
Whether......envision......of