来自唐雷的问题
【Itisrecordedthatin1982theweatherbecamesocoldthattheriverfrozeover.这里为什么用froze?不用hasfrozen或wasfreezing?】
Itisrecordedthatin1982theweatherbecamesocoldthattheriverfrozeover.
这里为什么用froze?不用hasfrozen或wasfreezing?

