Shortly after the traffic accident, two _______police were sent to the spot to keep order.

   A.dozen of         B.dozens        C.dozens of               D.dozen

Shortly after the traffic accident, two _______police were sent to the spot to keep order.

   A.dozen of         B.dozens        C.dozens of               D.dozen

Shortly after the accident , two ______ police were sent to the spot to keep order .

1. A.
   dozens of
2. B.
   dozens
3. C.
   dozen of
4. D.
   dozen

Shortly after the accident, two＿＿＿police were sent to the spot to keep order．  

A．dozen of B．dozens  C．dozen D．dozens of

Shortly after the accident, two＿＿＿police were sent to the spot to keep order．

A．dozen of B．dozens  C．dozen D．dozens of