·[he put up some signs_(ask)someone for help]有助于回答者给出准确的答案为什么?
问题描述:
·[he put up some signs_(ask)someone for help]
有助于回答者给出准确的答案
为什么?
答
to ask
·[he put up some signs_(ask)someone for help]
有助于回答者给出准确的答案
为什么?
to ask