Question

Birds singing is sometimes a warning to other birds ...

Birds singing is sometimes a warning to other birds away. A．Stay B．staying C．stayed D．to stay

Answer 1

D

试题分析：考查非谓语动词。句意：鸟的歌声有时是让别的鸟远离的警告。To do 做后置定语来修饰a warning,stay away 离开，故选D项。           考点 : 考查非谓语动词

Answer 2

意思是：鸟唱歌有时是对其他鸟的警告，望采纳，谢谢。