题目内容
It was in 1969 ________ two Americans went to the moon by spaceship.
A.when | B.that | C.at that time | D.just then |
B
解析

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题目内容
It was in 1969 ________ two Americans went to the moon by spaceship.
A.when | B.that | C.at that time | D.just then |
B
解析