But for friction (摩擦力), people ______ neither walk, nor even stand up. A. can B. were able to C. wi...
2022-11-30 17:30:03 193次 2015届河北省高二上学期期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
But for friction (摩擦力),
people ______ neither walk, nor even stand up.
A. can
B. were able to C. will be able to D.
could
本题链接：
