The streets in the centre of the city were            traffic．

A．choked up to                     B．choking up with       

C．choked up with                   D．choked up for

The streets in the centre of the city were ________ traffic．

1. A.
   choked up to
2. B.
   choking up with
3. C.
   choked up with
4. D.
   choked up for