It was a time_______ the killer whales helped the whalers catch the baleen whales.

1. A.
   when
2. B.
   that
3. C.
   then
4. D.
   which

It was a time_______ the killer whales helped the whalers catch the baleen whales.

It was a time_______ the killer whales helped the whalers catch the baleen whales.

   A. when        B. that        C. then         D. which

 It was a time_______ the killer whales helped the whalers catch the baleen whales.

A. when        B. that             C. then            D. which