--- Some people believe that robots will take over the world one day.

   --- What if that is the ______?

   A. thing          B. condition         C. case         D. end

—Some people believe that robots will take over the world one day.

—What if that is the ________?

A.thing          B.result          C.case            D.end

—Some people believe that robots will take over the world one day.

—What if that is the ________?

1. A.
   thing
2. B.
   result
3. C.
   case
4. D.
   end

 ---- Some people believe that robots will take over the world one day.

---- What if that is the ____?

  A. thing                 B. condition           C. case               D. end