题目内容
The next step in exploring ___________ outer space might be sending people there in ___________ spaceship.
A.不填; a B. 不填; 不填 C. the; 不填 D. the; the
A
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题目内容
The next step in exploring ___________ outer space might be sending people there in ___________ spaceship.
A.不填; a B. 不填; 不填 C. the; 不填 D. the; the
A