狼的复数

　　He thought he had better track this wolf and kill it

　　他认为最好跟踪这只狼，杀了它。

　　It is 250 years since the wolf became extinct in Britain.

　　狼在英国已经灭绝250年了。

　　She was fed up with the builders' wolf whistles each morning.

　　每天早上都有建筑工人冲她挑逗地吹口哨，她烦都烦死了。