We had ___him of the danger but he turned a deaf ear to our warning
问题描述：
We had ___him of the danger but he turned a deaf ear to our warning
a、warned
b、motioned
c、directed
d、tracked
答
A.warn sb of sth.警告某人不要做某事.
我们警告过他这样的危险,但是他对我们的告诫充耳不闻.
祝 进步!