Visitors to the hills are greeted by signs them to look out.A. warnB. to warnC. warningD.

发布时间：2020-08-17 08:09:37

Visitors to the hills are greeted by signs      them to look out.
A. warn
B. to warn
C. warning
D. warned

网友回答

A. warn
B. to warn
C. warning
D. warned
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