Nowadavs,most people,in order to keep fit,prefer walking to driving _________necessary.

    A.if    B.unless     C.in case      D.as if

Nowadavs,most people,in order to keep fit,prefer walking to driving _________necessary.

    A.if    B.unless     C.in case      D.as if

Nowadavs,most people,in order to keep fit,prefer walking to driving _________necessary.

1. A.
   if
2. B.
   unless
3. C.
   in case
4. D.
   as if

Nowadavs,most people,in order to keep fit,prefer walking to driving _________necessary.

Nowadavs,most people,in order to keep fit,prefer walking to driving _________necessary．

       A．if          B．unless          C．in case        D．as if