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___________they decide which college to go to, students should research the admission

      procedures.

      A. As           B. While     C. Until          D. Once

________they decide which college to go to, students should research the admission procedures.

A. As        

B. While  

C. Until         

D. Once

       they decide which college to go to, students should research the admission procedures.

   A. As              B. Once                               C. Until                 D. While 

       they decide which college to go to, students should research the admission procedures.

   A. As            B. Once                         C. Until               D. While 

_______ they decide which college to go to, students should research the admission procedures.

A. As           B. While              C. Until             D. Once

____ they decide which college to go to, students should research the admission procedures.

A. Once             B. While            C. Until                 D. As

___________they decide which college to go to, students should research the admission

procedures.