问题:
Was it in 1969 _____ the American astronaut succeeded ____ landing on the moon?
A.when; on
B.that; on
C.when; in
D.that; in
Was it in 1969 _____ the American astronaut succeeded ____ landing on the moon?
A.when; on | B.that; on | C.when; in | D.that; in |
参考答案: