1.It was in 1969 _______ the American astronaut succeeded in
1.It was in 1969 _______ the American astronaut succeeded in landing on the moon.A.that B.which
1.It was in 1969 _______ the American astronaut succeeded in landing on the moon.
A.that B.which C.when D.in which
2It was 1969 _______ the American astronaut succeeded in landing on the moon.
A.that B.which C.when D.in which 多选