The river such heavy pollution already, it may now be too late to clean it up.
A. has suffered B. has happened
C. has offered D. has filled
The river such heavy pollution already, it may now be too late to clean it up.
A. has suffered B. has happened
C. has offered D. has filled
【解析】选A。考查动词词义辨析。句意:这条河已遭受严重污染, 现在要想将它清理干净可能已太晚了。suffer遭受; happen发生; offer提供; fill充满。