— When did the couple die?
— It was on May 12     the earthquake hit WenChuan County.

— When did the couple die?

— It was on May 12     the earthquake hit WenChuan County.

-When did the couple die?

    -It was on May 12      the earthquake hit WenChuan County.

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

---- When did the couple die?

   ---- It was on May 12 _______ the earthquake hit Wenchuan County.

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

— When did the couple die?

— It was on May 12     the earthquake hit WenChuan County.

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