—Was it in 1969___________the American astronaut succeeded___________landing on the moon ?

    —Yes , that’s right .

         A．when ; on          B．that ; on   C．which ; in D．that; in

--Was it in 1969 ________ the American astronaut succeeded ________ landing on the moon?  

--Yes, that’s right.  

1. A.
   when; on
2. B.
   that; on
3. C.
   which; in
4. D.
   that; in

—Was it in 1969          the American astronaut succeeded          landing on the moon ?

    —Yes , that’s right .

       A．when ; on       B．that ; on   C．which ; in       D．that; in

—Was it in 1969___________the American astronaut succeeded___________landing on the moon ?

    —Yes , that’s right .

       A．when ; on       B．that ; on   C．which ; in       D．that; in

—Was it in 1969___________the American astronaut succeeded___________landing on the moon ?
—Yes , that’s right .