题目内容
The next step in exploring _________ outer space might be sending people there in ________ spaceship.
- A./; a
- B./; /
- C.the; /
- D.the; the
A
outer space表示“外部太空”,泛指概念;in a spaceship乘宇宙飞船。
outer space表示“外部太空”,泛指概念;in a spaceship乘宇宙飞船。
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