Dogs respond _____sounds that are too high for humans to hear.

Dogs respond _____sounds that are too high for humans to hear.
A、at
B、for
C、to
D、with
【正确答案】：C
【题目解析】：此句的意思是“狗能对人类听不到的声音做出反应。”“respond to”固定搭配，意思是“做出反应，响应”根据句意选择C项。