I___swim when I saw a sign written by the police.

I___swim when I saw a sign written by the police.

1. A.
   was about to
2. B.
   would
3. C.
   was going to
4. D.
   was to

I___swim when I saw a sign written by the police.

I ________ swim when I saw a sign written by the police that meant children under 18 are not allowed to swim without the adults guidance．

1. A.
   was about to
2. B.
   would
3. C.
   was going to
4. D.
   was to

I___swim when I saw a sign written by the police.

A.was about to     B.would      C.was going to     D.was to