put a feeler to 试探……的反应

【讲解】

feeler做名词，在此有“试探的手段”之意，因此,put a feeler to意思为“用试探的手段做某事"，即“试探……的反应”。

【对话】

A:He said he know nothing about it.

A:他说他对此一无所知。

B:It was really silly of you to believe what he said.

B:你相信他说的话，真是太傻了。

A:Why do you say so?

A:为什么这么说？

B:Didn't you know that he was trying to put a feeler to you?

B:难道你不知道他还在试探你的反应吗？