He tried twice more in the next twenty minutes with the same lack of response.

He was not surprised, or disappointed, at the total lack of response.

He did not say that the lack of response worried him.

I bet you are surprised at the lack of response to your question.

I could tell he was annoyed with my lack of response.

Perhaps there are two reasons for this lack of response.

Data and Beverly both knew what a lack of response meant.

Another problem is patients' lack of response to the drugs.

She smiled across at him, not put off by his lack of response to her question.

They've seen this young woman who was brave enough to come forward despite all the things she knew about the system's lack of response.