Scientists are working hard to make possible for people to live on Mars in the future. A. it B. that...
2022-11-16 20:21:20 160次 2017届江苏省镇江市九年级上期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Scientists are working hard to make possible for people to live on Mars in the future.
A. it B. that C. this D. one
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