The crossing was blocked by many trucks and buses,           made it impossible for us to go to work on time.

The crossing was blocked by many trucks and buses, ________ made it impossible for us to go to work on time．

1. A.
   where
2. B.
   what
3. C.
   whick
4. D.
   that

The crossing was blocked by many trucks and buses,           made it impossible for us to go to work on time.

     A.where      B.what      C.whick      D.that

The crossing was blocked by many trucks and buses,           made it impossible for us to go to work on time.