Visitors to the hills are greeted by signs them to look out. A. warn B. to warn C. warning D. warne...
2022-12-04 01:47:29 111次 2013-2014学年北京市石景山区高三上学期期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Visitors to the hills are greeted by signs them
to look out.
A. warn B. to warn C. warning D.
warned
本题链接：
