老师的提问没有得到任何回应，这种沉默的不回应让他很困惑。

The teacher was puzzled by the students' complete ___unresponsiveness to his questions.

政府对公众需求的冷漠导致了广泛的抗议。

The government's ___unresponsiveness to public demands led to widespread protests.

他的冷漠让周围的人感到难以亲近。

His ___unresponsiveness made people around him feel hard to approach him.