It was in 1969 ___ the American astronau
题型:选择题
问题:
It was in 1969 ___ the American astronauts first succeeded in landing on the moon.[ ]
A. that
B. when
C. which
D. in which
It was in 1969 ___ the American astronauts first succeeded in landing on the moon.[ ]
A. that
B. when
C. which
D. in which