People felt ________impossible for man to fly into outer space some years ago. A.that B.what C.it D....
2022-08-15 05:03:04 206次 宁夏石嘴山市2019-2020学年高一12月月考英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
People felt ________impossible for man to fly into outer space some years ago.
A.that B.what C.it D.this
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