To live on Mars, you need to wear boots which ________ to prevent you from floating off into space. ...
2023-01-01 01:25:45 78次 2015年江苏南京市玄武区中考一模英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
To live on Mars, you need to wear boots which ________ to prevent you from floating off into space.
A. design B. designed
C. are designing D. are designed
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