respond|responded|responding|responds

对于每个问题，他都回答“我不知道”。

To every question, he ___responded "I don't know."

我问她几点了，但她没有回应。

I asked her what the time was, but she didn't ___respond.

警察在几分钟内就能应对紧急情况。

The police ___respond to emergencies in just a few minutes.

该系统在毫秒内响应用户指令。

The system ___responds to user commands within milliseconds.

该公司正在通过改进服务来回应客户投诉。

The company is ___responding to customer complaints by improving its service.